i Anti Lost
-Suitable for: Wallet, Car, Kid, Pets, Bags,Suitcase or other belongings.
-Bluetooth version: Bluetooth 4.0 Low Energy,4.0 Smartphone .Andriod 4.3 version and up-grade version.
-Working distance: About 15 m,net Weight: 9 gram.
-Just need to connect to your phone bluetooth,and download app.
-Battery : CR2032 Lithium Coin Battery,Battery included.