B57 Smart watches Waterproof Sports for iphone phone Smartwatch Heart Rate Monitor Blood Pressure Functions For Women men kid

Descriptions 1. Product model: B57 smart bracelet2. Chip: NRF528323. Bluetooth: BT4.04. Compatible system: Android 4.4 and above, IOS 9.0 or above5. Waterproof rating: IP676. Screen: 1.3 inch IPS color Resolution: 240*2407. Touch: Single touch8. Battery: 180 mAh9. Charging: Magnetic charging10. Charging time: about 1.5H11. Standby: 25 days or so Working time: 7 days or so12. Bracelet material: PC case + plastic case13. Product size: about 48.9*34.5*11.7mm/1.92*1.35*0.46in14. APP support languages: Ukrainian, Russian, German, Italian, Japanese, French, Simplified Chinese, Traditional Chinese, English, Portuguese, Features:1. Bracelet display function: time display, battery icon display, date display, week display, standard motion function (step, distance, calorie) multi-sport mode (walking, running, cycling, skipping, badminton, basketball) , football, swimming), heart rate, blood pressure detection, blood oxygen detection, sleep time display, screen brightness adjustment, music con