Material: ABS Appearance size: 31*52*11MM Applicable system: IOS 7.0 above, Android 4.4 above Product colors are: black, white, rose, green, blue, green Note: APP application downloads: Android system in the application treasure download, ios system in the app store download Bluetooth version: Bluetooth 4.0 Battery: 1) CR2032 lithium coin battery (not included) 2) CR2032 lithium coin battery (not included) 3)CR2032 lithium coin battery (not included) Working distance: about 75 feet (accessibility)