? INSTRUCTIONS ARE EASILY ACCESSIBLE | QUESTIONS OR NEED ASSISTANCE?... don't hesitate to contact us. Prox Devices support information is in every box and the User Manual and Trouble Shooting Guide are provided in this listing with links below. ? COMPATIBLE ONLY WITH SMART PHONES: Apple iPhones (iOS); Samsung & Google Pixel (Android). 1-YEAR BATTERY LIFE (TYPICAL) – EASILY REPLACEABLE CR2032 BATTERY IS PREINSTALLED: Designed to be kept on 24/7. When the battery is low, the PRD will chirp every two seconds upon movement of the device until it is turned off. It cannot be turned back on until the battery is replaced. SIMPLE TO USE - NO ADJUSTMENT NEEDED - UP AND RUNNING IN 30 SECONDS: Alerts when leaving your phone behind without intruding on your life. Simply pair it with your phone, put it on a keychain or handbag, and you will receive a reliable alert when the PRD leaves proximity of your phone. Protect yourself from losing (even temporarily) one of the most integral technologies in your life – your phone. AVOID THE FRUSTRATION & ANXIETY OF A FORGOTTEN OR LOST PHONE: The Prox PRD beeps before leaving a phone behind. Have you ever forgot your phone on the charger when leaving the house?  Stop forgetting or leaving your phone behind. Don't forget your phone -- make sure you have your phone when you need it the most instead of having to find your phone after it's too late. NO SUBSCRIPTION - NO DATA COLLECTED OR SOLD - NO APP: The only device with this patented technology. No Sign-Up, No Registration, No Password, and No Tracking "Location Services" used to invade your privacy and drain your phone's battery. Thus, 100% Privacy with this anti-phone loss phone reminder device giving you an alarm when you leave your phone behind. No need to track, find, or locate your phone if it is not lost. The PRD does not ping the phone. STOP FORGETTING YOUR PHONE - RELIABLE PHONE SEPARATION ALERT BEFORE YOU LEAVE YOUR PHONE BEHIND: Using patent pending Advanced Alert Technology with motion sensing (NOT A TRACKER), the Prox PRD will alert you when leaving proximity of your phone. Typical alert distance range can vary greatly (50ft to 150ft) and may be shorter (w/obstructions) or farther when outdoors. (Phone not included.) The PRD does not alert at very short distances such as 10 feet.