L21 1.69 inch TFT Screen Smart Watch,Support Blood Pressure Monitoring Sleep Monitoring 1. Chip model: BK32886 2. ROM: 64MB 3. Bluetooth version: 5,0 4. Heart rate sensor: Tianyihexin 3300 5. Pedometer sensor: Silan Micro SC7A20 6. Screen: 1.69 inch TFT 7. Resolution: 240*280 8. Battery capacity: 220mAh 9. Material: zinc alloy + silicone 10. Waterproof grade: IP67 11. Compatible system: The supported system is iOS 9.0 and above, Android 4.4 and above 12. UI language: English, Chinese, Spanish, Portuguese, German, French, Russian, Italian, Thai, Dutch, Czech, Turkish, Malay, Slovak, Polish, Japanese (16 countries) 13. APP supports languages: Chinese, English, Chinese [Traditional], Japanese, Korean, French, German, Russian, Polish, Spanish, Portuguese, Dutch, Arabic, Czech, Greek, Hindi, Hungary, Italy , Slovakia, Turkey, Thai, Croatia (22 countries) 14. Functions: step counting, heart rate monitoring, sleep monitoring, blood pressure monitoring, blood oxygen monitoring, multi-sport mode, information and social information push, call reminder, alarm clock, sedentary reminder, stopwatch, find mobile phone, audio function, remote control camera, etc. 15. Dimensions: 43x36x9.8mm