USB HDMI Video Audio Dock Adapter to HD TV For IPad2 iPhone4 4S 3GS IPod touch Additional USB port has performance as date transmission, can easy download the photos from digit camera to your ipad and support extemal usb keyboard Use the iPad to HDMI Adapter to connect an iPad to your television, projector, or HDMI display, Then see your videos and slideshows on the big screen You can Charge from USB cable, when you watch video through you HDMI TV The HDMI adapter is small as like as the camera connection kit for ipad,and it's portable Support to transmit the video and aduio to HD TV or your DOCK to HDMI for ipad/iphone/ipod/touch,use to only transmit viedo