Description: 1.Anti-theft Key Finder:Smart Key Tracker is a great widget to remind you when you want to forget your items. Pair with the app and keep it running on the back end, once it disconnects, the phone and key locator will ring out to remind you, perfect for traveling and avoiding loss. 2.Portable and convenient:Smart key finder design is small and easy to carry. You can put it in your wallet as a wallet pick-up device, or you can use it as a mobile phone pick-up device or other item pick-up device together with your mobile phone, bringing your convenience anytime, anywhere. 3.Long Battery Life & Fashion:Bluetooth key tracking device is powered by CR2032 battery, standby time of more than 10 months, can be easily replaced for long-term use. The refined and elegant appearance makes it look like a work of art. 4.Find Your Items Key Locator is a great gadget that can help you search for and find items that you're always misplaced. Simply hang it on your luggage, wallet, key chain or pet. If you can't find an item, double-click the button on the app and it will beep to help you find the item quickly and easily. 5.Compatibility:When you disconnect the anti-loss device on your phone, you can view the location of the map; Supports iOS and Android 4.3 or later (requires Bluetooth 4.0). You can download the "iSearching" app from the app store or scan the QR code that came with the manual to download the software. Specification: Product name:Bluetooth anti-loss device Color:As shown in the picture Size: 38*38*7mm Material: ABS Packages include: 1* Bluetooth anti-loss device Note: Pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings.