Features:
Model: B31
Functions: Heart rate monitoring, blood pressure monitoring, sleep monitoring, multiple interfaces, waterproof, WeChat integration, call rejection, intelligent alarm, sedentary reminder, standby time of approximately 20 days, step counting, distance tracking, calorie tracking, WeChat and QQ payment.
Reminders: Caller name.
Notification support: WeChat, QQ, Facebook, Twitter, WhatsApp, Skype, Instagram, and more.
Camera control: Compatible with the original iOS camera app, built-in camera for Android apps.
CPU: MX2660B + CSR.
Acceleration sensor: BST-BMA253.
Screen: TFT screen.
Size: IPS 0.96 inches.
Resolution: 80x160.
Interaction mode: One touch.
Bluetooth: Bluetooth 4.0 LE.
Android requirements: Android 4.4 or above.
iOS requirements: iOS 9.0 or above.
24-hour monitoring.
Pedometer: Remote step and calorie tracking.
Sleep monitoring: Provides sleep time and sleep quality statistics.
Working time: 3-5 days.
![B31_14](https://ae01.alicdn.com/kf/HTB11itLXACy2eVjSZSyq6xukVXam.jpg?width=750&height=687&hash=1437)
![B31_04](https://ae01.alicdn.com/kf/HTB1FV59oDZmx1VjSZFGq6yx2XXab.jpg?width=750&height=926&hash=1676)
Multiple sports modes support
Podemeter step counting
Distance
Calorie
![B31_05](https://ae01.alicdn.com/kf/HTB1NYLwVRLoK1RjSZFuq6xn0XXaj.jpg?width=750&height=885&hash=1635)
Heart rate monitor and blood pressure monitor
![B31_06](https://ae01.alicdn.com/kf/HTB14azwVHvpK1RjSZPiq6zmwXXad.jpg?width=750&height=889&hash=1639)
Bluetooth wireless earphone
![B31_07](https://ae01.alicdn.com/kf/HTB17E_CVQPoK1RjSZKbq6x1IXXak.jpg?width=750&height=892&hash=1642)
Call message notification reminder
![B31_09](https://ae01.alicdn.com/kf/HTB1V0DpVMTqK1RjSZPhq6xfOFXan.jpg?width=750&height=866&hash=1616)
Sleep monitor and alarm clock reminder
![B31_11](https://ae01.alicdn.com/kf/HTB1xsTBVMHqK1RjSZFEq6AGMXXaB.jpg?width=750&height=487&hash=1237)
Anti-lost function find the device
![B31_15](https://ae01.alicdn.com/kf/HTB1nzkUcLc3T1VjSZLeq6zZsVXam.jpg?width=750&height=500&hash=1250)