GearBest.com has Teclast H30 Bluetooth 4.0 Heart Rate Monitor Smart Wristband on sale for $17.95. Shipping is free.
– Heart rate monitoring: it has a AGC intelligent heart rate monitor, which can make accurate calculate of heart beat and adjust the power
– Detachable dial: you can detach the dial from the wristband, easy charge for it
– Information pushing: it includes WhatsApp, Facebook, Wechat, SMS and calls
– Remote camera: it’s convenient to take photos by watch controlling the phone
– Raise your hand, bright the screen
– Sedentary remind, sleeping monitor, WeChat sports, etc.
– Screen: 0.86 inches OLED with 96 x 32 resolution
– DA14580 chip
– Bluetooth function can not be turned off