SYBA SY-ADA34002 connects your MHL capable devices directly to your HDTV using this adapter. Based off of MHL technology for audio and video output which supports the 1080p high definition resolution and 3D graphics. An additional microUSB port is included to allow charging of the source device while you output video and audio to your HDTV. For most instances-external power is not required however, it may be necessary in some cases.