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: 1. DVI output, connect the DVI devices using a DVI cable. 2. HDMI output, connect the HDMI devices using a HDMI cable. 3. VGA output, connect the VGA devices using a VGA cable. 4. Mini Display Port, connect Mac Book, Mac Book Pro, or Mac Book Air. Support Mini Display Port 1.1 a 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 1920x1080p@60Hz, 225MHz/ 2.25G bps per channel ( 6.75G bps 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.