1. Main chip: Nordic 52840, heart rate chip: GH301, Flash storage: 64Mbit2. Sensors: acceleration sensor, heart rate sensor, 9-axis gyroscope, geomagnetometer3. Main screen touch: full touch, full bonding process4. Support BLE5.0, support Android 5.0, IOS 8.0 and above5. Screen: 1.3 inch TFT color screen, resolution: 240*2406. Lithium battery: 170mAh-3.8V, battery life: 7-10 days7. Waterproof rating: IP688. Body size: 4x3.5x1cm replaceable 20mm silicone/TPU universal strap9. Body material: zinc alloy; wristband material: silicone wristband10. Ultra-thin, ultra-long standby 15 days, customizable dial11. Continuous sleep blood oxygen monitoring, early detection of sleep apnea syndrome, infrared sleep monitoring, no green light, no interference in sleep12. Automatic monitoring of continuous heart rate, black heart rate, blood oxygen, pressure, mood, and breathing rate to understand your own physical state13. The data during exercise can be customized display according to needs, making exercise more comfortable14. Professional dynamic heart rate, can be used as a data reference with the Japanese polo heart rate belt, can measure the heart rate of black skin15. Professional precise exercise, heart rate interval training (detailed display data), heart rate warning16. Support message push / alarm clock / schedule / custom dial / sleep detection / sedentary reminder / step count reminder, etc.17. Support 18 kinds of sports, swimming, running (multiple running modes, colorful night running), ball sports, etc., counting sit-ups and skipping ropes18. Calculate swimming distance, SWOLF and other professional swimming pool swimming data