Size

Generation

Aluminum case with Sport Band or Sport Loop

Aluminum case with Sport Band or Sport Loop

Stainless steel case with Sport Band or Milanese Loop
Ceramic case with Sport Band

GPS, GLONASS, Galileo, and QZSS
Altimeter
Water resistant
Speaker
Microphone
Capacity 16GB
GPS + Cellular

42mm
312 by 390 pixels
740 sq mm display area
38mm
272 by 340 pixels
563 sq mm display area
Retina OLED display
1000 nits brightness

LTE and UMTS
GPS + Cellular models

Built-in rechargeable lithium-ion battery
Up to 18 hours

Aluminum case - 38mm
Aluminum case - 42mm