Apple Watch Series 6 comes with an OLED display, blood oxygen sensor, LTE support, and the Apple S6 chipset. The smartwatch is available with an Aluminum, Stainless steel, or Titanium case. The 40mm case version is appropriate for 130-200 mm wrists.
 
Tech Specs:
 
Display
1.6 inches
394 x 324 pixels
 
Hardware
Apple S6
1GB RAM
 
Storage
32GB, not expandable
 
OS
watchOS 6.x