Feature: 1. [Easy To Find Items] You can put the Bluetooth item finder on your frequently misplaced items, such as keys, purse, backpack, children, pets, to prevent loss and save your time to find things. One app can add multiple finders to manage your items easily. 2. [Multi Functional] Bluetooth item finder can guard your phone and valuables with rich features, such as check the last lost location on the map, phone alert when lost, remote self timer function, left item alert, find your phone, etc. 3. [Two Way Alarm] When the Bluetooth item locator is disconnected from your cell phone, the mobile app will remind you, and the locator will also sound an alarm, as long as the product is out of range, your cell phone and this anti loss device will sound a beep to remind you. 4. [Positioning Function] The smart key finder has a positioning function, which is convenient for you to check the last position of the object on your cell phone to help you find it. You can open the map in the app and determine the approximate location of the lost object. 5. [Energy Saving] This key finder has a built in replaceable battery, which is energy saving. With the app settings, you can easily keep your keys, handbag and other items safe. It can also be placed on children or pets to ensure their safety. 6. [Compatible Devices] The item tracking device has wide compatibility with for iPhone 13 12 11 X 87 series, for Android system, for Android 8.0 or higher, the phone must support 5.0 or higher Bluetooth version to meet your different usage needs. Specification: Item Type: BT Item Finder Material: Plastic Support for IOS and for Android Systems: For IOS 12.5.5 Or Higher, for Android Version Requires 8.0 Or Higher, Phone Must Support 5.0 Or Higher BT Version BT: 5.0, Bluetooth Low Power (BLE) Support Two Way Alarm: Support Frequency Range: 2.402-2.480ghz Operating Power: -94dbm Operating Temperature: 0-50℃ Operating Voltage: 2.7-3.2V Stopping Current: Less Than 10uA Battery: 1 x 240mAh CR2032 (Included). Package List: 1 x BT Item Finder1 x Instruction Manual