Product Description: Bluetooth:V4.0+EDR Battery:CR2032 Button Battery Language:English,Chinese,French,Spain Material:Plastic Size: 3.5cm/1.18"X0.7cm/0.28" Color:Blue,Pink,Black,White Package Include: 1 x Smart key Finder 1. Anti-loss of expensive goods, when the mobile phone and anti-loss device exceed the default effective distance, two-way automatic alarm, remind the owner and prevent loss (for the elderly, children, pets, etc.) 2. Two-way search, forget to take the mobile phone? Where is the wallet? The anti-loss alarm can help you. 3. Remote self-timer, easy to control mobile phone remote for photography (maximum 10 meters). 4. Location tracking, you can see the current location of the object on the mobile phone, and you can find the last stop position after disconnection. 5. A mobile phone can manage up to six anti-loss devices at the same time.