B57 Smartwatch Features:

• Color: Black, White, Pink
•  bluetooth Version: BT 4.0 or above
•  Compatible OS: Android 4.4 or above , iOS 9.0 or above
•  Operating Mode: Touch Screen
•  APP Name: HeroBand
•  App Language: English, Portuguese, Spanish, German, French, Russian, Italian, Ukrainian, Arabic, Korean,   Japanese, Simplified Chinese, Traditional Chinese
•  Waterproof: IP67
•  Heart Rate Monitor: Support
•  Blood Pressure Monitor: Support
•  Blood Oxygen Monitor: Support
•  Sleep Monitor: Support
•  Multi-sport Modes: Support Walking, Running, Swimming, Skipping, Riding, Badminton, Basketball, Football
•  Pedometer: Support
•  Call orMessage Reminder: Support
•  Reject Call: Support
•  Notification: Support Facebook,Twitter,Wechat, WhatsApp, Skype
•  Alert Type: Vibration
•  Auto Light-up Screen: Support
•  Other Functions: Support Alarm,Calender,Sedentary reminder,Camera remote control,Anti-lost,Weather   Reminder, Stopwatch  Sensor: Triaxial acceleration sensor, Heart Rate Sensor
• Chip: NRF52832
• Screen: Size: 1.3inch
• Type: IPS
• Resolution: 240*240 pixels
•  Battery: Battery Capacity: 180mAh
• Standby Time: About 25 days
• Using time: About  7 days
• Charging Time: About  2 hours
• Charging Type: Magnetic charging