1. When the device is connected to the cell phone APP Bluetooth, use the search function of the APP to make the anti-loss device sound and find the item. 2. Applicable objects: elderly, children, keys, wallets, luggage, etc 3. Material: ABS+metal 4. Compatible system: BT5.0 / iOS 14.3 and above 5. Battery: CR2032 button cell 6. Standby time: about 1 year 7. Protection level: daily life waterproof 8. Size: 4.1x3.5x0.9cm 9. Net weight: 9g
