Specifications Dimensions 43.25 x 36.25 x 9.4mm Weight (without strap)Approx. 24.8g Body material Aircraft-grade aluminum alloy, polymer material Strap material Silicone Strap length120 mm (long), 87 mm (short) Strap width 20mm Waterproof rating 15 ATM Display 1.65" AMOLED, resolution 348 x 442, 341ppi, 100% NTSC, always-on display Touch screen Corning Gorilla 3 generation tempered glass + anti-fingerprint coating Sensors BioTrackerTM PPG Bio-Tracking Optical Sensor 6-axis acceleration sensor 3-axis geomagnetic sensor Air pressure sensor Ambient light sensor Bluetooth BT5.0 BLE Battery 2220mAh lithium-ion polymer battery (typical value) Charging time About 2 hours Charging method Magnetic / 2-pins POGO pin Battery Life Typical usage scenario: 14 days Heart rate always on, sleep monitoring; 150 pushed notifications lighting-up the screen, lift the wrist to see the time 30 times, and 5 minutes for other operations every day; exercise 3 times a week for 30 minutes with the GPS on.Basic watch mode: 46 days Turn off the Bluetooth connection, heart rate and other functions, and lift the wrist to see the time 100 times a day.
Supported devices Android 5.0 or iOS 10.0 and above AccessoriesMagnetic charging stand, user manualAppZepp App (formerly known as the Amazfit App)