Keep tracking and find your items in the Find My App(only ISO); Built-in speaker play beep sound to help find your things, when you item lost,it can leads you right to your nearby or tell you the newest location. Don't need to download any app, just click play sound in for Apple Find My, and the key tracker tag will emit a sound to guide you quickly to find the stuff. Wide Range of Applications Suitable for wallet, backpack, suitcase, cars and any other business you want to know the location in time. Privacy Protection & Easy operate: To protect privacy, all communication with the Find My network is anonymous and encrypted, Location data and history are never stored on the finder tag.The tag has been certifed MFI, only open Find My APP and bluetooth, then tap "Add Item" and "Other Supported Item" Unlike other Android smart finder, our Bluetooth key finder have a more powerful range and accurate positioning through Find My network & bluetooth. You don't have to get close to the items. You can use the key tracker at home or anywhere. Use the Find My APP to ring the tag when it's within Bluetooth range. if it out of Bluetooth range, In Find My app ,it will direct you find your item position. Battery:CR2032-230mAh Communication protocol:Bluetooth 5.2 Colour:A:Black Material:pc Package Contents: 1 * Locator 1 * English instruction manual