Note: This item did not include battery.

Size: Approx 5.2 x 3.1 x 1.1cm.

Compatible Devices: iPhone 5S/5C/5/4S/3rd gen, iPad Air, iPod touch(5th gen)

Andriod system with bluetooth 4.0 Smartphone (Andriod 4.3 version and up-grade version).

Bluetooth version: Bluetooth 4.0 Low Energy.

Compatible Phone: iPhone 4S/5/5S/5C, iPad Mini, iTouch 5, iPad 3/4, iPad Air and Andriod system with Bluetooth.

4.0 smartphone (Andriod 4.3 version and up-grade version).

Working distance: about 75 Feet (without barrier).

Suitable for: Wallet, Car, Kid, Pets, Bags, Suitcase or other belongs.

Battery: CR2032 Lithium Coin Battery (Not included).