Apple Watch 38mm (1st gen)

Network     Technology   
No cellular connectivity
Launch     Announced     2014, September
Status     Available. Released 2015, May
Body     Dimensions     38.6 x 33.3 x 10.5 mm (1.52 x 1.31 x 0.41 in)
Weight     40 g body (2.72 oz)
Build     Stainless Steel/Ceramic back
SIM     No
     - IPX7 certified - water resistant up to 1 meter and 30 minutes
Display     Type     AMOLED capacitive touchscreen, 16M colors
Size     1.5 inches, 7.1 cm2 (~55.1% screen-to-body ratio)
Resolution     340 x 272 pixels (~290 ppi density)
Multitouch     Yes
Protection     Sapphire crystal glass
     - 3D Touch display
- 450 nits
Platform     OS     watchOS 1.0, upgradable to 4.1
Chipset     Apple S1
CPU     520 MHz Cortex-A7
GPU     PowerVR SGX543
Memory     Card slot     No
Internal     8 GB, 512 MB RAM
Camera           No
Sound     Alert types     Vibration; Ringtones
Loudspeaker     Yes
3.5mm jack     No
Comms     WLAN     Wi-Fi 802.11 b/g/n
Bluetooth     4.0, LE
GPS     No
NFC     Yes
Radio     No
USB     No
Features     Sensors     Accelerometer, gyro, heart rate
Messaging     SMS(threaded view), Email, Push Mail, IM
Browser     No
Java     No
     - MP3 player
- Photo viewer
- Siri natural language commands and dictation
Battery           Non-removable Li-Ion 205 mAh battery (0.78 Wh)
Stand-by     Up to 18 h (mixed usage)