FUKREY M4 Smart Watch Band Bluetooth Waterproof  (Black Strap, Size : Free Size)

1. Screen: 0.96" OLED big screen. You can check anything. You can check the date via vertical layout or horizontal layout for your choose. 2. IP67 waterproof: Can play a protective effect on soaking hand washing, rain, effectively prevent sweat and other corrosion. 3. Built-in 65mAh battery, normal use time about 48 hours or so, heart rate has been opened about 5 days 4. Call & SMS message alert: Message smart remind, remind you anytime, anywhere. 5. Real-time heart rate monitoring: With a built-in motion sensor, real-time measurement of heart rate to adjust the intensity of exercise. 6. Tracking daily activities data: Record steps, distance, calories, Check daily activities data anytime. 7. USB charge: No need data cable anymore, convenient, fast chargin.