http://www.tinydeal.com/xiaomi-mi-band-1s-heart-rate-sleep-monitor-call-reminder-pedometer-px371kj-p-156919.html
Brand: XIAOMI
Model: Xiaomi Mi Band 1S Light Sensation
Sensor: Gravity Sensor
Smartphone OS Compatibility: Bluetooth 4.0, Android 4.4 or above, iOS 7.0 or above
Bluetooth: 4.0...