Compact size and lightweight design and low energy consumption, supports Bluetooth 4.0 and the effective range is up to 25 m, anti lost alarm, keep your valuables within range, supports find phone function and voice recording function, can trace your car on parking lot and retrieve your lost items, works as a remote shutter for self portrait, capture the happiest moment easily, suitable for wallet, car, kid, pets, bags, suitcase or other belongings, compatible Phone: iPhone 4 S/5/5 S/5 C, ipad mini, i touch 5, ipad 3/4, iPad Air and android system with Bluetooth 4.0 Smartphone android 4.3 version and upgrade version, effective Range 25 m outdoor environment, battery c r 2032 lithium coin battery, stand by time 6 month, weight 33.17 g, size 15*9*1.5 cm, color blue.