Features: This product with three output ports, and you can choose one of them to use at a time as you demand, the functions of the port as followings: DVI output, connect the DVI devices using a DVI cable. HDMI output, connect the HDMI devices using a HDMI cable. VGA output, connect the VGA devices using a VGA cable. Mini Display Port, connect Mac Book, Mac Book Pro, or Mac Book Air. Support Mini Display Port 1.1a Dual-mode input. The HDMI can support audio output for iMac (Late 2009) and Mac Book Pro (Mid 2010) Support HDMI/DVI/VGA output with the max resolution of 1920x1080p60Hz, 225MHz/2.25Gbps per channel (6.75Gbps all channel), 12bit per channel (36bit all channel) deep color. Automatic detect the display by plugging and unplugging it. Powered from Mini Display Port source. Specifications: Color: White Input Signal: Mini Display Port 1.1a Output Video: HDMI/DVI/VGA Input: Mini Display Port Male 20pin Output: HDMI Female Type A 19pin Connector: DVI Female (24+1) 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 How to use it: The product is easily and conveniently use, with three output ports:DVI VGA HDMI and a Mini Display Port. And you can use one of them at a time as your demand, when you want to use the DVI output, you just need to connect the DVI devices using a DVI cable. And when you want to use the HDMI output, you just need to connect the HDMI devices using a HDMI cable. When you want to use the VGA output, you just need yo connect the VGA devices using a VGA cable.The Mini Display Port meed to connect Mac Book, Mac Book Pro, or Mac Book Air. Compatible models: Mac Book Air, Mac Book Pro, iMac, and Mac mini with thunderbolt ports since 2011 are all supported. Mac Book Air, Mac Book Pro, iMac, and Mac mini or PC with mini display port are also supported. MS Microsoft surface pro 3 2 1 Note: You should assure that if your Mac has one of the following two kinds of port : mini DP port and Thunderbolt port Package included: 1 x3 In 1 Mini DP to DVI VGA HDMI Adapter cable