HD Full Circle 1.2 Inch Color Screen Smart Bracelet Fashion Waterproof Sports Bracelet Health Monitoring-7The product is shipped based on the color or size of the main image of the product page.ECG monitoring assesses heart health, integrates PPG + HRV measurement technology, and discards cumbersome medical equipment to be monitored anytime and anywhere through the watch. Easy to use You can measure heart rate, blood pressure, blood oxygen directly on your watch, predict your physical health in advance, or you can view more comprehensive data through the mobile phone APP. It can automatically detect and record your daily sleep, analyze the sleep stage and time, detect sleep heart rate, and provide sleep improvement suggestions. Covers daily and professional sports modes, and provides algorithms for each mode to meet the wide needs of sports people. Features: Name: Smart Bracelet Material: zinc alloy steel belt, belt Appearance size: 125mm Product weight: 59g Operation mode: touch + button Watch diameter: 42.5 mm Watch thickness: 10.8 mm Strap width: 20mm Display: 1.2 round screen Processor: Nordic NRF52832 Memory: 512Mb + 128Mb Bluetooth: V4.2 Sensors: dynamic optical heart rate sensor, acceleration sensor Battery capacity: 165mAh Mobile phone system: Android 5.1 and above, I0S10.0 and above Waterproof rating: IP68 (Daily waterproof and dustproof, no swimming)