Unlike other fitness devices, the screen of B1 can easily be popped out of the wristband, and can be used to make and receive calls. The device tracks both your sleep and your health, and is IP57 water- and dust-resistant, so it can be worn in the shower.
The USB connector here is the strap itself, which lets you charge it up easily. The talktime via earpiece is quoted at 7 hours with 2 weeks of standby capability.
