Firstsing Smart Watch Bracelet Fitness Tracker Sleep Monitor Bluetooth 4.0 Sport Wrist Watch for IOS Android

Bluetooth Version: 4.0
Display Size: 0.86 inch OLED
Supported Operation System: iOS7.0 and above, Android 4.3 and above
Battery: 50mAh
Standby Time: 20 days
Sleep monitoring function, can check your sleep quality at any time.
Pedometer function, can trace steps effectively.
Has more functions, such as movement distance, calorie consumption management, time display, message reminder, etc.