Product parameters:
Main chip models: nRF51822 (Cortex M0 16MHz)
Life waterproof
Acceleration sensor: triaxial accelerometer
Display: OLED 0.66 inch 64x48 Dots
Vibration motor: cylindrical vibration motor
Heart rate monitor
Key way: touch keys

product features:
Walking steps: record day walking steps
Walking mileage: Record day walking mileage
The exercise time: recording time your day movement
Consumption of calories: Displays calories you consume day
Sleep Records: Monitoring the quality of sleep you all night .
Calls to remind: important calls / SMS alert
Heart Rate Detection: Supports real-time monitoring of heart rate and electrocardiogram