Easy and Quick to Locate: Can't find your lost items? Simply press the button and follow the beeps! Easily locate items like keys, wallets, TV remotes, keychains, glasses, dog collars, or other things that are easily lost using the included keyrings. Ultra-Long Battery Life: Bluetooth 5.0 technology, extremely low power consumption, CR2032 battery power supply, standby time estimated at more than 6 months, easily replaceable. Connects to your mobile phone's Bluetooth function, two-way search function, and allows multiple locator devices to be connected simultaneously. Smart Disconnect Reminder: If your mobile phone and Bluetooth tracker are out of range, you will be notified by both your phone and the Bluetooth key finder. The app records the location where the item was last disconnected from your phone to narrow down the search area. This is a great gift for those who always forget things. Effective Coverage: The effective distance between your mobile phone and the GPS tracker is approximately 15 to 30 meters indoors and 25 to 50 meters outdoors. The effective distance is shorter when obstacles are present. Small and Portable: The wireless tracker is very small and lightweight; you can easily slip it into your wallet, attach it to your backpack, suitcase, or keys. It's easy to carry. Our package includes four trackers to meet your additional needs. Specifications: Size: 38*38*87mm; Weight: 7g; Colors: Black, White, Orange, Pink; Connection: Bluetooth; Range: 25m; App Compatible: Android/iOS; Package Contents: 4*Trackers