Description: Compatible devices:for iPhone and iPod touch models with iOS 15.0. Battery: replaceable CR2032 button battery Bluetooth Connection: Bluetooth technology, inductive search at close range; precise search function. When the device and phone are connected, you can use the device to find your phone or use your phone to find the device Sound Alarm: NFC touch, support lost . Built-in speaker, When the distance exceeds the connection range, the phone and item finder will make a sound at the same time to prevent loss Global Position Tracker: As long as you are on the earth, we can find you. The map section shows the location, and the device location is clear at a glance. The app will record the last disconnection location in the map. Easy to Carry: Lightweight and compact. These small receivers can be attached and hooked to anything you want. IP67 level waterproof, anti-drenching, anti-splash. Specification: Material: ABS Plastic Size Chart: 32x32x9.0mm/1.26x1.26x0.35inch Package Includes: 1 Piece Tracking Device Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!