Material: ABS+Silicone Compatible Devices: iPhone 5S/5C/5/3rd 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 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) Suitable for: Wallet, Car, Kid, Pets, Bags, Suitcase or other belongs Working distance: 25m (outdoor environment) Battery:CR2032 Lithium Coin Battery (Not included) Connects up to 10 iTag unit App Name: iTracing (Free of charge) App language: English, Chinese, French, Spanish How to use: download an App iTracing (Free of charge),open your bluetooth and connect to the tracker,then you can use it. Size: app.5.2*3.1*1.1cm/2.05*1.22*0.43inch Available colors : Black, Green, White, Blue, Pink Quantity: 1 Pc Note: 1.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!