Xiaomi Mi Band is the most affordable wearable smart device that has sold more than 6 millions unit. The next Mi Band was spotted at NCC Taiwan’s website and leaked some photos that high potential it’s the successor’s of Mi Band.
From the photo it shown that a heart-rate sensor that would provide much more feature and accurate of health activity monitoring.
The design and size look likely the same with the current Mi Band, thus the rubber strap can be reuse.
With the add-on of heart-rate sensor the battery life may reduced.