Prox PRD User Manual
Approximate Setup Time = 30 secs.
Easy as 1, 2, 3
Turn on: Hold down button for 3 seconds until the PRD power up sound is heard
Pair: Go to "Settings" > Bluetooth > Select "PRD_XXXX" to pair
Adjust alert distance (optional): 3 clicks (1 beep = near, 5 beeps = far, 3 beeps = default)
Change alert tune (optional): 4 clicks
The Prox PRD™ ("PRD") is a user-friendly, Bluetooth® short-range phone reminder. It is designed to alert when it is no longer in proximity of the paired phone. Once paired, the PRD can be adjusted to longer (or shorter) distances (approximately 10 feet to 150 feet). All of this is done without the use of a mobile app and without any location services draining the phone's battery and tracking the user, thus respecting the user's privacy. The PRD will alert the user before the phone is lost rather than being a device that finds the phone after it is lost. Losing a phone is stressful and the PRD is there to prevent that from happening in the first place.
In some circumstances and by design, the PRD will not continue to provide in-range or out-of-range proximity phone alerts. This only occurs after the PRD has alerted the user that the phone is no longer in proximity, and then only after the PRD has not been physically moved for an extended period of time. For example: placing keys and the PRD on the table when entering the house; the user would not continue to receive alerts after the initial lack of a proximity alert when walking away from the PRD with phone. The PRD will return to normal operation once moved, providing an alert to let the user know if the phone is or is not in proximity of the PRD.
In addition, turning Bluetooth off then on via the phone will not cause disconnect and reconnect alerts respectively on the PRD. Alerts only occur from proximity between the phone and the PRD. This prevents alerts in the middle of the night during automatic iOS or Android software updates, which reboot phones.
Apple: iPhone 6s or newer running iOS 14.0 or later
Android: Samsung A5, S6, Z Flip 5G, Z Fold, Z Fold 5G, Samsung Note 8, or newer, running Android 8.0 or later
May be Compatible:
Smartphones using Android version 8.0 or later. If the phone is not on the above list it does not mean the PRD is not compatible. Instead, it means the PRD has not been tested on the phone and Prox Devices cannot guarantee or warrant that the PRD will work with it.
Android Go Edition
Most "feature phones" (e.g., flip phones without a touchscreen)
Apple or Samsung phones with modified mobile OS (i.e., jailbroken)
Turning PRD On / Off
To turn the PRD on or off, press and hold the button for approximately three (3) seconds until the power on tune is heard and the blue LED is seen (or the power off tune is heard and the red LED is seen). Once the PRD is turned on, it is designed to be left on continuously 24/7.
When turning off the PRD, there will be four (4) beeps, representing Temporary Nap Mode discussed below, of which should be bypassed until the PRD turns off.
Note: The best way to reset the PRD to its default factory settings is by removing the battery and then inserting it back in (using the same battery or a new one).
Pairing to Phone
No app is required. Pairing only needs to occur one time. Simply turn on the PRD and the blinking blue LED will indicate that the PRD is ready to pair with the phone. (It is only during this pairing / bonding period that the blue LED will be blinking on the PRD.) In the phone's Bluetooth settings, the PRD_XXXX can be selected and paired. The PRD will automatically turn itself off if it's not paired to a phone within two (2) minutes.
The PRD will continue to reconnect automatically if returning within proximity of the phone after a separation alert, mobile OS update, or turning the phone's Bluetooth off and then back on. The PRD will only work when the phone's Bluetooth is turned on.
The PRD adapts to the user's RF environment through frequency hopping. It is possible to initially experience a false alert while the PRD is learning the user's environment. This may happen after initial pairing or when there is a change in the surrounding environment.
The PRD contains components that emit radio frequencies which may interfere with some medical devices such as pacemakers. Maintain a safe distance between the PRD and any medical device. Stop using the PRD if it is suspected that it is interfering with any medical device and consult a doctor or the medical device manufacturer for information regarding the medical device.
WATCH: How to pair Prox PRD™ to a phone
Transferring PRD to New Phone
After initial pairing, if the PRD is to be paired with a different phone, it will first need to be unpaired from the first phone by going to the phone's Bluetooth settings, selecting the icon to the right of the PRD_XXXX, and tapping "Forget this device" for iOS or tapping "Unpair" for Android. Turn the PRD off. Once the PRD is turned back on, it will be ready for immediate pairing to a new phone.
Note: The video instructions for transferring the PRD to a new phone are located at the end of the pairing video above.
The PRD continuously adapts to the user's environment and determines the most robust and stable frequencies for connecting with the phone. As the PRD is learning a new environment, it may alert at shorter distances where obstructions (e.g., walls, buildings, etc.) may be present until it fully adapts.
Connectivity Check - 1 click
Simply click the button one time. No LED light on the front of the device indicates the PRD is not turned on. A blue LED light indicates the PRD is on and connected to the phone. A red LED light indicates the PRD is on but not connected to the phone. (If the PRD displays a red LED, it will look to reconnect back with the phone more frequently. This is especially helpful in attempts to find a disconnected phone. Once connected, a reconnection sound will occur.)
Remote Camera Shutter Control - 2 clicks (bonus feature)
This feature (remote selfie clicker) is a simple way to control the shutter on the phone's camera app. It is designed specifically with the user in mind. This feature is unique to the PRD in that it does not disable the phone's keyboard and it does not require the PRD to be turned off when not in use as with other remote shutter control devices.
To use this feature, first open the camera app on the phone. If the camera app is in "photo" mode, a double-click on the PRD will remotely control the shutter and a picture will be taken after a short pause. If the camera app is in "video" mode, a double-click on the PRD will remotely start recording a video with a second double-click to stop the recording.
Most camera apps allow the shutter to be triggered by pressing the volume buttons. The PRD takes advantage of this by sending a remote “volume up” signal to the phone, which then causes the camera app shutter to activate and take a photo. When not using a camera app, it will increase the volume setting on the phone. However, when using the camera app, it takes a picture just as though a volume button was pressed. Not all camera apps support this feature, in which case the PRD won’t work with those apps. Some apps allow the volume button(s) to be enabled as a shutter controls within their settings menu.
WATCH: Remote Shutter Control (Selfie Clicker)
Adjusting Alert Distance - 3 clicks (optional)
There are five (5) alert distance settings. The PRD can be put into alert distance adjustment mode by quickly clicking the button three (3) times. The default is setting 3, which is represented by the three beeps. Once in this mode, a single-click will increment the distance setting, with setting 1 coming after setting 5 in rotation.
Setting 1 (one beep) represents the shortest distance and the reconnect alert will only occur when in immediate proximity of the phone or once the phone is picked up. (This is to ensure the phone is retrieved.) Setting 1 has the highest level of sensitivity and may not be the best selection based on the circumstances and the surrounding environment. Setting 5 (five beeps) represents the furthest distance, which allows for freedom to roam around with fewer unneeded alerts.
Note: Setting 1 is the shortest alert distance and most sensitive. It is designed this way so that a reconnection will only occur when the phone is picked up and the PRD is next to it.
Distances can vary depending on the orientation / location of the phone, the mobile OS version of the phone, the surrounding environment (indoor, outdoor, high ceilings, etc.), the RF environment, and where the PRD is located on the body. Different environments will have different ranges for the same setting.
Typically, the distance ranges will extend from approximately 10 feet to upwards of 150 feet. Once a setting is selected, wait a few seconds and the PRD will automatically lock in that setting (indicated by a confirmation tune), exit out of the alert distance adjustment mode, and return to normal operation.
In general, if the user is experiencing false alerts or more alerts than preferred, an increase in alert distance is recommended. It is not abnormal for the PRD to have a few false alerts within the first 24 hours as it learns the RF environment.
WATCH: Adjusting Alert Distance
Selecting Alert Tune - 4 clicks (optional)
There are multiple alert tunes that encompass a variety of pitches & frequencies, thus allowing those who hear better at certain frequencies to find a suitable audible sound. Some alert tunes may be more practical in loud industrial environments. Selecting different tunes can also be helpful if there are two or more PRDs within the same household or office; however, longer tunes will slightly shorten battery life depending on the average number of alerts received per day.
The PRD can be put into Selecting Alert Tune Mode by quickly clicking the button four (4) times. Once in this mode, a single-click will rotate through the tune selection. Once a tune is selected, wait a few seconds and the PRD will automatically lock in that setting (indicated by a confirmation tune), exit out of the Selecting Alert Tune Mode, and return to normal operation.
WATCH: Selecting Alert Tune
Selecting Home or Travel Mode - 5 clicks + Hold button (optional)
There are two (2) basic PRD modes: Home (default) and Travel. Home mode helps reduce the number of alerts as the PRD will only alert if it is moving away from the phone. Travel mode alerts if either the PRD is moving away from the phone or the phone is moving away from the PRD.
The PRD can be put into Selecting Home or Travel Mode by clicking the button five (5) times and then holding the button down until a single beep or double beep occurs which indicates the current mode. Once in this mode, a single-click will toggle between the two selections: one (1) beep represents Home mode and two (2) beeps represent Travel mode.
Once a mode is selected, wait a few seconds and the PRD will automatically lock in that mode (indicated by a confirmation tune), exit out of the Selecting Home or Travel Mode, and return to normal operation.
In Home and Travel modes, if there is a disconnection and the PRD hasn't moved for 15 minutes, it will go into a low power state. But upon movement, the PRD will either give a separation alert if it cannot connect with the phone, or give a reconnection alert if it is connected to the phone.
If Bluetooth is manually turned off on the phone, the PRD will disconnect. The very next time the PRD is moved, it will give an alert. From there, it will not give anymore alerts until Bluetooth is turned back on and the PRD is moved. This is good for meetings, classes, and the like where the phone is not present and further alerts are not desirable.
When attending the above-mentioned events, and the time period to suppress alerts is known, Nap mode is a good option. But if you want alerts to be suppressed indefinitely, simply turn Bluetooth off (or for iOS, the phone can be turned off as well). After the initial alert upon turning Bluetooth off or the phone off (for iOS), there will be no further alerts until Bluetooth is turned back on and the PRD reconnects with the phone.
Note: For some Android smartphones, turning the phone off may not suppress the alerts, so it is recommended to manually turn Bluetooth off to suppress any further alerts.
WATCH: Selecting Home or Travel Mode
Temporary Nap Mode - Hold button for beeps
There are four (4) nap mode settings that will temporarily suspend alerts for a specified period of time as noted below. To access these settings, press and hold the button down. The PRD can be put into nap mode by releasing the button after hearing one, two, three, or four beeps, but before the PRD turns off. When the button is released, the first five notes of the "Rock-A-Bye-Baby" lullaby tune will play, indicating that nap time has begun.
Each beep represents a different timer for the length of the nap time where the PRD will not alert until either the specified time has elapsed and the PRD is moved, or the button is clicked once. (Click the button manually if nap time needs to be cut short to return the PRD to normal operation.)
Releasing the button after:
1 beep = 15 mins of nap time
2 beeps = 30 mins of nap time
3 beeps = 60 mins (1 hr) of nap time
4 beeps = 120 mins (2 hrs) of nap time
When the PRD wakes from its nap (either by elapsed time and movement, or clicking the button), the PRD will either sound a reconnection alert indicating it is paired back with the phone, or it will sound a separation alert indicating the phone is not within proximity to reconnect. Either alert will indicate that the PRD is no longer in nap mode and once again functioning as a phone reminder.
Nap time can be especially beneficial when it is desired that alerts not occur for a temporary short period of time (e.g., when purposely away from the phone during meetings, classrooms, etc.) or a situation is created that temporarily causes alerts and reconnections to happen repeatedly (e.g., washing a car and walking around the car multiple times). It is also beneficial if the PRD is separated from the phone and trying to avoid the PRD from going into a low power state due to inactivity.
Nap Mode should be used sparingly to avoid the potential of a phone being left behind.
WATCH: Nap Mode
Using Multiple PRDs
It is possible to have multiple items (e.g., keys, bags, purses, backpacks, etc.) with a different Prox PRD™ attached to each of them, with all of the PRDs connected to the same phone. In cases such as this, it is easy for any one or more of the personal items to not be used for extended periods of time, while other items are being used more frequently.
The PRDs that are attached to the less frequently used items will automatically adjust to a minimum power state to save on battery consumption. The PRD is designed to perform self-diagnoses, which is why it is not necessary nor recommended to turn it off, but rather keep it on 24/7 and let the PRD make adjustments for you as you go.
When a PRD is finally moved after being dormant for long periods of time, it will immediately activate and resume normal operations as a phone reminder.
With the PRD being kept on continuously 24/7, the approximate battery life is a little over one (1) year. Battery life will vary based on usage and the number of alerts received per day. The chart above gives a full analysis of the approximate battery life depending on the default settings or adjusted configuration (distance setting and alert tune).
Note: The PRD is designed to continuously search for the phone if the PRD is moving. So, if the PRD is on the move for extended periods of time, and the phone is out of range, the battery will drain at a faster than average rate, thus reducing its life. This might be typical of professions where people are on their feet for eight (8) hours without their phone (as noted by the red line in the graph above).
Exposing the PRD to excessive temperatures (above 140ºF), such as leaving it on a car dash on a sunny day, will significantly reduce battery life or exceed safe temperatures for the battery. (Please see the Battery Safety section below.)
If the PRD is no longer sending out alerts or the button appears to be functioning incorrectly, check to make sure the PRD's outer case is properly snapped into place. If the case is not completely closed, the PRD may malfunction. If the PRD still does not work, the battery most likely needs to be replaced.
Low Battery Warning:
When the battery starts to get low, the loudness of the alerts will be noticeably reduced and/or the LEDs will become dimmer, especially the blue LED. From here, the PRD may operate for several more months, depending on the number of alerts. Eventually, the blue LED will stop illuminating, which indicates that the battery is nearly exhausted. At this point, it's recommended to replace the battery with a new one.
The PRD will continue to function normally until the battery reaches a critical level. At which point, the PRD will stop operating as a phone reminder and the user will be alerted with a low-battery chirp every two (2) seconds, upon movement of the device. To disable the chirp, simply press and hold the button on the PRD for one (1) second; this will cause the PRD to turn off. From here, the PRD will not be able to be turned back on until the battery is replaced, upon which the PRD will be restored back to its default settings.
The PRD contains a CR2032 coin cell battery. The battery may need replacement during the lifetime of the device. Replace only with batteries of the same type and rating, while observing the correct polarity. There is a risk of fire or electric shock if the battery is replaced incorrectly or with the incorrect type. Don't press anything sharp on the PRD's inner components and keep the PRD free from dust and moisture.
Note: When the battery is replaced, the PRD will automatically turn on and connect to the phone if it is within close proximity of the PRD.
To replace the battery:
1. Use an average blunt dinner knife (or small flat-head screwdriver) to remove the front cover by inserting the tip of the knife (or screwdriver) into the small slit near the key-ring area.
2. Remove the cover and use the knife (or screwdriver) to remove the battery.
3. Insert a new CR2032 battery into the battery slot with the positive side up.
4. Replace the cover, making sure all corners of the cover are fully snapped in. (This is very important as the PRD will not function properly without the cover being securely fastened).
5. Once the battery is replaced and the PRD is turned back on, the PRD will be restored back to its default settings.
WATCH: Battery Replacement
KEEP OUT OF REACH OF CHILDREN. Swallowing may lead to serious injury or death in as little as 2 hours due to chemical burns and potential perforation of the esophagus. If you suspect any swallowing, immediately take your child to the emergency room; have the doctor phone 800-498-8666 (the National Battery Ingestion Hotline). Inform them that the battery type swallowed is a CR2032 coin cell Lithium / Manganese Dioxide battery
Battery compartment design. To prevent children from removing batteries, the PRD was designed to allow access to the battery compartment only with a tool. Keep the batteries out of reach of small children and pets.
Only replace the PRD battery with another CR2032 LiMnO2 battery. Using an improper battery may result in battery leakage, fire, or explosion.
Do not crush or short the battery (at the positive and negative terminals). Do not expose the battery to fire, excessively high temperatures (not to exceed 200ºF), or submerge in water. This battery contains Lithium and Manganese, and doing so may result in battery leakage, fire, or explosion.
How to dispose of batteries:
Batteries are considered hazardous waste in California when they are discarded. This includes AA, AAA, C, D, button cell, 9 Volt, and all other batteries, both rechargeable and single-use. All batteries must be recycled or taken to a household hazardous waste disposal facility, a universal waste handler (e.g., storage facility or broker), or an authorized recycling facility.
To find more information on how to recycle batteries, the best place to start is by visiting Earth911.com, where there is plenty of helpful information, including answers to the most frequently asked questions about how to dispose of used batteries. Another extremely useful resource is Call2Recycle.com, the only free rechargeable battery collection and recycling program in North America.
A few important safety facts:
About 3,500 lithium coin battery swallowing cases are reported every year
Children under age 4 are at greatest risk
Coin lithium batteries can get stuck in a child’s esophagus
Swallowing can cause serious injury in less than two (2) hours
Symptoms of ingestion are coughing, drooling, and discomfort
Storing spare batteries out of a child’s reach is critically important
Purchase child-resistant battery packaging that requires scissors to open when purchasing replacement batteries.