Specifications:

Design:
Color: Obsidian Black
Size (square): 46.4*46.4*10.7mm
Weight: Classic model-39g (without strap)
Body: Classic-stainless steel
Buttons: 2 buttons
Waterproofing Grade: 5ATM8

Screen:
Material: AMOLED
Size: 1.39 inches
Resolution: 454×454
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 days
Basic Usage Battery Life: 38 days
Heavy Usage Battery Life: 6.5 days