Chromecast specs:
Output: HDMI, CEC (Consumer Electronics Control) compatible
Max. Output Video Resolution: 1080p
Dimensions:
Device: 51.9 x 51.9 x 13.49 mm (not including cables or accessories)
Package: 124.4 mm x 42.85 mm x 124 mm
Power cable: 1.75 m (69 in)
Ports and connectors:
HDMI
Micro-USB
Color: Black, Coral, Lemonade
Weight: 39.1g (0.086 lbs)
Wireless Standards: 802.11c Wi-Fi (2.4GHz/5GHz)
Wireless Security: WEP, WPA/WPA2
Power: 5V, 1A power supply

Supported Operating Systems:

Android 4.1 and higher
iOS 7.0 and higher
Windows 7 and higher
Mac OS 10.7 and higher
Chrome OS (on a Chromebook running Chrome 28 & higher)