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. Net weight of the product: about 25.7g
15. APP support languages: Ukrainian, Russian, German, Italian, Japanese, French, Simplified Chinese, Traditional Chinese, English, Portuguese, Spanish, Arabic, Korean