Watch Category
Unisex
Measurements
38 mm
Height
38.6mm
Width
33.3mm
Depth
10.5mm
Case
25g
SOFTWARE
OS version
Apple Watch may ship with watchOS. But watchOS 2 will be available as a free download beginning September 16.
Sensors
Heart Rate sensor, Accelerometer, Gyroscope, and Ambient light sensor

CONNECTIVITY
Connectivity
Wi-Fi (802.11b/g/n 2.4GHz)
Bluetooth 4.0
AUDIO
Internal Mic
Yes
Speakers
Yes
IN THE BOX
Sales Package
Apple Watch
Magnetic charging cable (2 m)
USB power adapter (5W)
Sport Band (includes band that can be configured for either S/M or M/L length)
Quick start guide
BATTERY
Battery / Power Life
Approximately 18 hours of battery life