jestine Waterproof Bluetooth Sports Smart Wristband Watch Bracelet Fitness Tracker Support Blood Pressure, Sleep Tracker, Heart Rate Tracker for Kids, Women and Men (Black)

Material: ABS, Silicone
Color: Black, Blue, Red
Dimension: 4.3 x 3.3 x 1inches
Bluetooth Version: Bluetooth 4.0
Battery Capacity: 100mAh
Charging Time: About 2 hours
Occasion: Casual
Compatible with: Android, IOS
Features:
Scientific sleep tracking.
Professional running coach.
Built-in GPS and continuous heart rate.
Easy to adjust the length to fit your wrist.
Contracted design style, with you life contracted and not simple.
Support all day wear, rain, and even a swim in the pool.
Package Content: 1 x Wristband