The listing, m8 SmartWatch has ended.
Bluetooth: 3.0+EDR
Range of Frequency: 2.4GHz spectrum
Standby Time: About 160 hours
Power Supply: Built-in rechargeable battery
USB: 5-pin Micro USB port
Battery: 230mAh
Compatibility: iOS Apple iPhone 4s/5/5s/5s/6 (Not supported messaging, for calls only), Android OS (HTC; Samsung S2/S3/S4/S5/Note 2/Note 3)
All lists rules apply.. I factory reset the smart watch. Works great just don't use it. Got a new phone not compatable to it..