Welcome to our store!quality is the first with best service.customers all are our friends Specification 1. Model: HYTRON E500 2. Dimensions: 35mm in diameter, 12mm in thickne 3. Screen: Square HD AMOLED 4. Screen size: 1.92 inch 5. Resolution: 240*284 HD AMOLED 6. Chip: low-power design GR5515 7. PPG Chip: SFH2201 8. ECG, : real-time ECG analysis of chest stickers,ECG monitoring 9. Blood Oxygen Chip: GH3220 RF analog front-end+ SFH2201 10. Temperature Sensor: CT1711 array 11. ECG Chip: TYHX3220 12. G-sensor: Rohm KXTJ3-1057 13. Bluetooth: 5.0 14. Battery Capacity: 280mAh 15. Charging Way: Magnetic suction charging line (protect)USB 2.0 16. Charging Time: about 3-4h 17. Battery Life: 7-12 days 18. Standby Time: 30-40 days 19. Waterproof: IP68 20. System requirements:Android 4.4 + / IOS 10.0 + -APP name: H Band -Languages: Available in Ruian, Hungarian, Turkish, German, Italian, Czech, Slovak, Japanese, French, Polish, Persian, simplified Chinese, traditional Chinese, English, Portuguese, Spanish, Vietnamese, Arabic, Korean Function Heart rate monitoring, blood preure monitoring, blood oxygen monitoring, multi-sport mode, custom dial, online multi dial, exercise record. Sleep monitoring, incoming call and meage reminder, ultra-low power consumption and long battery life. Metal alloy shell, silent alarm clock, remote camera, music control, sedentary reminder, drinking water reminder, weather display, countdown, shake to take pictures, mobile phone search. Package List: smart watch*1/charging cable*1/user manual*1 Tip: 1.This product is only suitable for daily life waterproofing. There are only a few drops of water on the surface. Please do not take it to swim or wear it in the shower. Do not touch hot water.2. Please charge for more than half an hour for the first use. The watch may freeze completely long after delivery.3. If the product has quality problems, please contact us. We will solve any problem for you. This wearable device collects data through electronic sensors. And the accuracy is at the level of consumer electronics, so there may be slight deviations, which are normal.4. Multiple activity modes: outdoor running, outdoor walking, indoor running, indoor walking, hiking, stepper, outdoor cycling, indoor cycling, elliptical machine, rowing machine, etc. If you have any questions during use, please contact customer service as soon as poible