SIFIT-6.5 Bluetooth Smart Bracelet Pedometer ECG & Heart Rate

SIFIT-6.5 Blutooth Smart Bracelet Pedometer ECG Heart rate

Specifications : 

* ECG, Heart Rate Wristband

*  Li-Battery: 70mAH/3.7V 

*  Voltage: 3.3V
*  USD Charging: 5V+/-5%
*  Working Time: >=5days
* Charging time: 2-3h
* Bluetooth Distance: >=4m (no block )
* OLED, blue-on-black
* Temp: -10°C to 55°C
* Button control
* Water-proof: IP67