Z4 Heart Rate Smart Wristband Support Steps Calories Distance Display Sports Fitness Tracker Smart Bracelet Built-in lithium polymer battery sustainable

Built-in lithium polymer battery sustainable camera up to about 100 minutes

Circuit protections

2 x Solar Motion Sensing Light

helmet and camera showed in the pictures are not included in the package

Charge Screen Type: IPS Screen Size: 0

Z4 Heart Rate Smart Wristband Support Steps Calories Distance Display Sports Fitness Tracker Smart Bracelet Built-in lithium polymer battery sustainableProduct Features: Great Craftsmanship W4S wristband built in 0. 96 inch OLED display screen, clearly showing the date, clock and battery power. It looks fashion and thin. Silicone watchband with adjustment holes, wear it comfortable and valuable Dynamic Heart Rate Monitor 24 hours dynamic heart rate detection, Built in heart rate monitor sensor and 3 axis acceleration motion sensor let heart rate data more accurate Activity Tracking for Workouts It