1. Product model: B57 smart bracelet 2. Chip: NRF52832 3. Bluetooth: BT4.0 4. Compatible system: Android 4.4 and above, IOS 9.0 or above 5. Waterproof rating: IP67 6. Screen: 1.3 inch IPS color Resolution: 240*240 7. Touch: Single touch 8. Battery: 180 mAh 9. Charging: Magnetic charging 10. Charging time: about 1.5H 11. Standby: 25 days or so Working time: 7 days or so 12. Bracelet material: PC case + plastic case 13. Product size: about 48.9*34.5*11.7mm/1.92*1.35*0.46in 14. APP support languages: Ukrainian, Russian, German, Italian, Japanese, French, Simplified Chinese, Traditional Chinese, English, Portuguese, Specifications: 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 control. 2. Reminder function: incoming call, SMS, QQ, WeChat reminder (display content and name). Facebook, Whatsapp, Twitter, Skype, and other foreign social software reminders, alarm clocks (three sets of alarm clocks), sedentary reminders. 3. Other functions: intelligent anti-lost, remote control photography, do not disturb mode, raise hand to bright screen, time format setting, factory reset, long press to reject incoming calls, three clock interface selection, music control (support previous song, next song, play/pause), weather display, for apple health, etc. Package Included: 1* Bracelet 1* Instruction Manual 1* Charging Cable