In the Box: Just Apple Watch (No Strap & Charging Set provided)

Body
Dimensions: 41 x 35 x 10.7 mm (1.61 x 1.38 x 0.42 in)
Weight: 32 g (1.13 oz)
Build: Glass front, ceramic/sapphire crystal back, aluminum frame
SIM: No
IP6X certified
50m water resistant
ECG certified (region dependent SW application; HW available on all models)

Display
Size: 1.9 inches (Always-on display)
Resolution: 484 x 396 pixels (~326 ppi density)
Protection: Sapphire crystal glass

Platform
OS: watchOS 9.0, upgradable to watchOS 10.1
Chipset: Apple S8
CPU: Dual-core
GPU: PowerVR

Memory
32GB 1GB RAM

Features
Sensors: Accelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body)
Temperature sensing (0.01˚ accuracy)
Ultra Wideband (UWB) support

Battery
Type: Li-Ion 282 mAh, non-removable
Charging: Wireless, 0-80% in 45 min (advertised)