HUAWEI WATCH D Smart Healthy Watch Black

1 Matching system HarmonyOS 2 and above Android 6 0 and above iOS 9 0 and above 2 Screen 1 64 inches AMOLED touch color screen resolution 280×456 3 Battery capacity 451mAh wireless charging dock 4 Theoretical charging time about 2 5 hours 5 Theoretical working time typical usage scenarios can last up to 7 days 6 Body material aluminum alloy middle frame plastic sapphire bottom case 7 Strap material Viton 8 Strap adaptation circumference M size 130 160mm L size 161 200mm 9 Bluetooth frequency band 2 4G 10 Bluetooth protocol Bluetooth 5 1 11 Sensors acceleration sensor gyroscope sensor optical heart rate sensor temperature sensor ALS sensor differential pressure sensor Hall sensor ECG acquisition sensor 12 Operating system HarmonyOS 13 Support message reminder voice assistant alarm clock timer OTA software upgrade 14 Waterproof and dustproof IP68 15 Size 51x38x13 6mm 16 Weight about 40 9g without strap 17 Functions blood pressure measurement ECG acquisition heart rate monitoring blood oxygen monitoring sleep monitoring breathing training pressure monitoring body temperature research 70 exercise modes 18 Language support English 19 Packing list Smart Watch including L size watchband and L size airbag x 1 M size airbag including airbag cover x 1 M size watchband x 1 Independent cover x 1 L size airbag cover spare x 1 M size airbag cover spare x 1 Charging base x 1 Quick start x 1 Wearing guide x 1