Thank you for viewing. Please read the following description carefully. Description: The anti-theft key finder smart key tracker is a convenient small tool that alerts you when you are about to forget your belongings. By pairing it with a dedicated app and keeping the app running in the background, both the key tracker and your smartphone will sound an alert when they are disconnected. It is ideal for travel and preventing loss. Features: Portability and Convenience The smart key finder is small (38 x 38 x 7mm) and lightweight, making it easy to carry. You can put it in your wallet and use it as a "wallet finder," or carry it with your smartphone or other belongings. It can be used conveniently anytime, anywhere. Long-Life Battery & Stylish Design Powered by a CR2032 battery, it achieves a standby time of over 10 months. Battery replacement is also easy, allowing for long-term use. With a sophisticated and elegant design, it looks like a work of art. Finding Your Belongings The key locator is the perfect tool for finding items you often lose. Attach it to your luggage, wallet, key ring, pets, etc., and you can find them immediately by making a sound with a double tap of the app's button. Location Information Confirmation If the anti-lost device is disconnected from your smartphone, you can check the last connection location on the map in the app. Compatibility Compatible with iOS and Android 4.3 or later (Bluetooth 4.0 compatible). You can download the "iSearching" app from the App Store or obtain the software from the QR code listed in the included manual. Specifications: Size: 38*38*7mm Material: ABS - Color: White - Usage: Location tracking - Battery: None (Please prepare a CR2032 button battery separately.)