A:Answer The headphones require Bluetooth to work and the adapter supplies that if your TV doesn't have that feature. The adapter plugs into your TV with 3.5mm, RCA or TOSLINK Digital Optical cables that come with the adapter. The adapter also requires power via a USB power cord, which is included, but a 110VAC USB adapter is not included. The volume can be turned up to be really loud. The headphones block out a lot of ambient room noise, so the sound from the TV is easier to hear and understand.