Unpack, connect, ready! This little speaker is to saturate the tinny sound of a low buget LED TV. And that's what he does astonishing mastery! Electricity comes via USB directly from the TV device, battery operation is also possible. The sound is pulled with the included RCA cable from the headphone jack. Volume control is also possible with the TV remote control. Even when fully turning up the volume directly on the soundbar, hear no annoying clanking or humming. Unfortunately, the last volume setting will not be saved after you have turned off the sound bar. Nevertheless, 5 stars for a well-made product, with many additional connectors, adapters and a carry bag for a spontaneous smartphone party in the park.