1.Wireless name: KAKU-XK
2.Call: Wireless call; Chip: Ruiyu 8762CW; APP: FitPro
3.Compatible systems: Android 5.0 or above, iOS 9.0 or above
4.FLASH memory: 128MB; Screen size: 1.28 inches; Pixel: 240 * 240 resolution
5.Touch type: Full screen touch; BT: 5.0; NFC: Support; 6.Battery: Polymer lithium ion 280mAh
7.Charging time: 2 hours; 8.Charging method: magnetic suction charging; 9.Waterproof grade: IP67
10.Battery life: 3 days of use, 10 days of standby
11.Language: Supports 23 languages, and the app can switch multiple languages
12.Material: Body: Plastic+Zinc Alloy Wrist Strap: Silicone