Specification:
Input Signal: Mini Display Port 1.1a
Output Video: HDMI1.3 / DVI / VGA
Input/Output Connector:
Input: Mini Display Port Male 20pin
Output: HDMI Female Type A 19pin
Output: DVI Female (24+1) VGA Female 15Pin
Output: VGA Female 15Pin
Vertical Frequency Range: 50/60Hz 
Video Amplifier Bandwidth: 2.25Gbps/225MHz
HDMI/DVI/VGA: 480i/480p, 576p,720p,1080i/1080p
External Power Supply: No external power needed
Power consumption (Max):700Mw
Operating Temperature: 0 ? to +70?
Operating Humidity: 10% to 85 % RH (no condensation)
Storage Temperature: 5% to 90 % RH (no condensation)
The cable Length:20cm
Color: Snowy white
Main item size: 8.0 * 4.5 * 2.0cm / 3.15 * 1.77 * 0.79in
Main item weight: 46g / 1.64oz
Package size: 19.5 * 11.0 * 2.5cm / 7.68 * 4.33 * 0.98in
Package weight: 52g / 1.84oz

How to use:
This product has one input port (Mini Display Port) three output ports (DVI VGA HDMI), and you can choose one of them to use at a time as your demand, the functions of the port as followings: 
1. DVI output, connects the DVI devices by a DVI cable.
2. HDMI output, connect the HDMI devices by a HDMI cable.
3. VGA output, connect the VGA devices by a VGA cable.
4. Mini Display Port, connect for Mac Book, for Mac Book Pro, or for Mac Book Air.
When connecting the iMac (Later than2009) and Mac Book Pro (In mid of 2010) to HDMI display, please set “Sound” on the dialog box of “System Preferences” to get audio output.
Attention: Insert / Extract cable gently. 
Note: 
You can only plug one port among this three output ports at one time, and you cannot use two or all of them simultaneously.
Please make sure that your Mac has mini DP port or Thunderbolt port, and you should know that whether you device support audio output.

Package list:
1 * Thunderbolt Display Port to DVI VGA HDMI Adapter cable