Lookatool 3 in 1 Mini Display Port DP to DVI+VGA+HDMI Adapter for MacBook Pro, Black Mini Display Port, connect Mac Book, Mac Book Pro, or Mac Book Air. This product with three output ports, and you can choose one of them to use at a time as you demand. 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. Note: Only one of the 3 outputs could be used at a time, you cannot use all of them simultaneously.