This Emerson two-channel IR transmitter allows the transmission of two audio sources to two different headphones at the same time. Features include: Allows transmission of two audio sources to two different headphones at the same time High performance IR transmitter with 7-meter effective range High frequency modulation One pair of high performance dual channel headphones 12V DC input Lightweight headphones design Adjustable headband Headphones run on two AAA batteries (not included)