CY22 1.47 inch Silicone Strap IP67 Waterproof Smart Watch, Support Heart Rate Blood Pressure 1. Compatible systems: Android system: Android 4.4 and above iOS system: iOS10.0 and above 2. Chip: Jerry 7012 (single chip dual mode, IOSAndroid single connection), 3. Functions: three UI menu styles, offline Alipay, breathing training, dial push, stopwatch, brightness adjustment, multi-sports mode, sleep, heart rate, blood pressure, blood oxygen, information, remote music, remote photography, weather, find mobile phone (connect to mobile phone) calculator, split screen display, quick widgets, weather, sports track, etc. 4. Language: APP language: Chinese, English, German, Russian, Spanish, Portuguese, French, Japanese, Italian, Polish, Korean, Arabic, Persian, Thai, Vietnamese, Traditional Chinese, Danish, Greek, Latin, Romanian. Turkish, Hebrew, Czech Device language: English, Chinese, Traditional Chinese, Danish, Greek, Latin, Romanian, Turkish, Hebrew, Czech, Polish, Spanish, German, Russian, Portuguese, French, Japanese, Italian, Vietnamese, Korean, Arabic, Persian, Thai 5. APP: CO FIT 6. Heart rate sensor: VC30F (with liveness detection) 7. Bluetooth: Bluetooth 5.0 8. Waterproof level: IP67 9. Craftsmanship: zinc alloy craftsmanship 10. Net weight: 21g 11. Screen size: 1.47 inches (curved screen), resolution: 172x320 12. Screen type: IPS full-view color screen, material: glass 13. Total length of wristband: 260 mm 14. Wristband material: silicone 15. Battery: Type: pure cobalt battery + precision protection board Model: 502020 polymer Voltage: 3.7V Capacity: 180mAh 16. Battery life: 7-10 days in normal connection, 15-20 days in standby mode 17. Charging method: magnetic charging 18. Charging time: about 2 hours