Watch SE Space Gray Aluminuim Case with Midnight Sport Band

Apple Watch SE : 

40mm or 44mm case; over 30 percent larger display.

Retina LTPO OLED display, 1000 nits.

Ion-X glass display.

GPS and GPS + Cellular models.

S5 SiP with 64-bit dual-core rocessor; W3 wireless chip.

Digital Crown with haptic feedback.

Optical heart sensor.

High and low heart rate notifications and irregular heart rhythm notification.

International emergency calling,4Emergency SOS,5 and fall detection.

Water resistant 50 meters.

LTE and UMTS,7 Wi-Fi, and Bluetooth 5.0.

GPS/GNSS, compass, and always-on altimeter.

50 percent louder speaker2; built-in mic.

32GB capacity.

Dimensions 40 millimeters :

Height : 40mm.

Width : 34mm.

Depth : 10.4mm.

Case Weight (GPS) : 30.49g.

Dimensions 44 millimeters :

Height : 44mm.

Width : 38mm.

Depth : 10.4mm.

Case Weight (GPS) : 36.20g.