Specifications:  

• Material: ABS
• Appearance size: 37*37*6MM
• Applicable system: IOS 7.0 above, Android 4.4 above
• Product colors are: black, white, red, 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: CR2032 lithium coin battery (not included)
• Working distance: about 75 feet (accessibility) Work with Bluetooth