1. Master chip: nRF52832 2. Sensor: ROHM KXTJ3 3. PPG Ship: Everlight PD70 4. BLuetooth: Low power 4.0BLE 5. Screen: 1.14 inch TFT color screen 135*240 6. Material: Panel: glass / Middle bezel: metal / Back shell: ABS+Carbon fiber 7. Battery: 140mAh polymer lithium battery 8. Charging time: about 2H, Endurance time: 4 days, standby time: 15 days. 9. Compatible systems: Android 4.4 and above, iOS 8.2 and above. 10. Main features: continuous heart rate test, pedometer, calories, distance, motion trace, sleep monitoring, call reminder, alarm reminder, hand-on bright screen, social sharing (WeChat, QQ, Facebook, Twitter), shake hand to take phonto, etc. 11. Smart bracelet language: Chinese and English 12. APP support language: Chinese, Traditional Chinese, English, Japanese, Korean, German, Russian, Spanish, Italian, French, Vietnamese, Portuguese 13. Packing: Smartwatch, Charging box, Instruction, Packing box