Apple Watch SE 2 45mm

40mm or 44mm case; over 30 percent larger display
Retina LTPO OLED display, 1000 nits
Ion-X glass display
S5 SiP with 64-bit dual-core processor; W3 wireless chip
Digital Crown with haptic feedback
Optical heart senso
High and low heart rate notifications and irregular heart rhythm
Emergency SOS, and fall detection
Water resistant 50 meters
50 percent louder speaker; built-in mic