B57 Smart Watch Waterproof Fitness Tracker Sport for IOS High-tech Smartwatch Heart Rate Monitor Blood Pressure Functions

This smart watch has a stylish appearance and is suitable for people of all ages. Smart watches have excellent battery life and can track your health for up to 10 days without stopping to recharge. Automatically track your sleep through smart watches and our app, and analyze your sleep quality to help you develop a healthier lifestyle. The smart watch is compatible with most smartphone versions of iOS 9.0 and Android 5.0 or higher, and can notify you of calls, text messages, emails, calendars, and application notifications. The smart watch has GPS function, which can achieve precise positioning anytime and anywhere..syi