1. Chip model: TLSR8251F512ET48/JLAC6956A 2. RAM: 32KB, ROM: 32MB 3. Bluetooth version: BLE +V5.1+BR+EDR 4. Heart rate sensor: Silan micro sc7R31 5. Pedometer sensor: 3D-gsensor, SC7A20 6. Screen size: 1.69 inch TFT screen, resolution: 240*280 7. Battery capacity: 200mAh 8. Waterproof rating: IP67 9. System requirements: IOS9.0 and Android 4.4 and above 10. APP supports languages: Chinese, English, Japanese, Spanish, French, German, Russian, Portuguese, Italian, Arabic, Polish 11. UI languages: Chinese, English, Japanese, Korean, German, French, Italian, Spanish, Portuguese, Russian, Thai, Vietnamese 12. Functions: call reminder, alarm clock, sedentary reminder, stopwatch, find mobile phone, remotely take pictures, answer calls, music playback, step counting, heart rate monitoring, sleep monitoring, blood pressure monitoring, blood oxygen monitoring, Bluetooth call, female menstrual cycle reminder , Multi-sports modes (step counting, running, cycling, indoor running, swimming, exercise, spinning, dancing, roller skating, basketball, badminton, golf, rugby, tennis), etc. 13. Material: plastic spray, silicone 14. Size: 45.0x37.0x10.0mm