Apple Watch SE 3 (44 mm):
Case: Aluminum (44 mm size) — 44 × 38 × 10.7 mm, fits wrists ~140–245 mm.
Weight: ~32.9 g (GPS) / ~33.0 g (GPS + Cellular) for the 44 mm size.
Display: Always-On Retina LTPO OLED, resolution 368 × 448 pixels (~977 mm² display area), up to ~1000 nits brightness.
Processor & Storage: S10 chip (64-bit dual-core) with 4-core Neural Engine, 64 GB internal storage.
Sensors & Features: 2nd-generation optical heart sensor, temperature sensor, compass, always-on altimeter, high-g accelerometer, high dynamic range gyroscope, ambient light sensor, gesture controls (double tap, wrist flick).
Connectivity & Water Resistance: GPS (and optional Cellular with 5G support), Water Resistant to 50 meters (5 ATM).
Battery Life: Up to ~18 hours typical use; Up to ~32 hours in Low Power Mode. Fast-charging (0-80 % in ~45 minutes) as reported.
Compatibility: Requires iPhone 11 or later with iOS 26 or later.