Specifications Design Color Obsidian Black Size (square) 46.4*46.4*10.7mm Weight Sport model-31.5g (without strap) Classic model-39g (without strap) Body Sport-Aluminum alloy Classic-stainless steel Buttons 2 buttons Waterproofing Grade 5ATM8
Screen Material AMOLED Size 1.39 inches Resolution 454x454 PPI 326 Touch Screen Tempered glass anti-fingerprint coating ODLC coating
Endurance Battery Capacity 471 mAh (typical value) Charging Method Magnetic Charging Stand Charging Time About 2.5 hours Typical Usage Battery Life 14 days9 Basic Usage Battery Life 38 days
Sensor Health Huami self-developed BioTracker™ 2 PPG (support blood oxygen) biological data sensor Movement Air pressure sensor, Acceleration sensor, Gyroscope sensor, 3-axis geomagnetic sensor, Ambient light sensor
Connection Bluetooth 5.0 WLAN 2.4GHz
Other Speaker Support Microphone Support Linear Motor Support
Packing List Watch body (including standard strap) Charging base Instruction manual