Features1Distance and Disconnection: The working distance is approximately 10 to 50 meters for updating. Once your item is out of range and lost, the application will automatically record the last location where the locator for this item was disconnected from the phone. Therefore, you can infer the approximate location based on the previous record point displayed in the application map to find your lost item. The phone and item searcher will continue for about 10 seconds when disconnected. 2Easy To Use: Pull out the insulation sheet and it will open when you hear a drop. Then use your phone's Bluetooth to search and connect to the device. If you lose your phone, double click the tracking button and your phone will sound an alarm. 3Applicable Scenes: The smart anti loss device is suitable for storing keys, wallets, bags, and umbrellas. When you are far away from your goal, it will remind you that you don't need to worry about losing anything. 4Stable Connection and Working Time: The key finder is easy to connect, very stable, and maintains good connection. The smart anti loss device is very small and does not take up too much space. The battery can be used for 180 days. 5Ideal Gift Choice: This smart anti loss device key finder will be an ideal gift for your family and the elderly, who may have misplaced their keys or phones, which can help them solve many problems. It's not just a smart Bluetooth anti loss device, it's the joy of life.SpecificationItem Type:SmartAntiLossDeviceMaterial: ABS, Electronic ComponentsWeight: Approx. 24g / 0.8ozBattery Type: CR2032H Button Battery (Shipped With Built In Battery)Number Of Batteries: 1Battery Capacity: 240mAhPackage List1 x SmartAntiLossDevice1 x Manual