This Panasonic SCHTB500 Sound Bar Home Theater System features a Wireless Kelton Subwoofer that adds impact to your movies and music with dramatic deep bass. Clear-mode Dialog improves the vocals of your system with this advanced sound setting. Advance Bamboo Cone allows you to enjoy detailed clear vocals in your music and movies. The SC-HTB500 is compatible with a new feature of Audio Return Channel (ARC). ARC allows receiving audio signals from the TV, on top of the preexisting HDMI function of sending audio/video signals to the TV with just one cable. This new feature will simplify the connection by eliminating an audio cable connection between TV audio output and the main unit's audio input.