These headphones feature built-in wireless technology which means that you can listen to your Hi-Fi or TV without the inconvenience & restrictions of a cable connection. They're perfect for late nights watching TV or movies, or for listening to music without disturbing those around you. The 30mm drivers provide superior sound quality with excellent bass response, smooth mids & superb clarity. The headphones are very lightweight & feature fully cushioned earpads for maximum comfort over extended listening. An on-ear volume control allows for convenient control of audio levels. The compact Transmitter unit connects to your TV or audio device via a 3.5mm stereo jack or a stereo phono connection. It also features a built-in USB (Universal Serial Bus) DAC (Digital to Analogue Audio Converter) for connecting to your PC. Package Contents WHF-45 Wireless TV Headphones Transmitter unit with built-in USB (Universal Serial Bus) DAC Transmitter multi country power supply 1.5m USB (Universal Serial Bus) A to Mini-B cable 2m stereo audio cable with 3.5mm jacks 3.5mm jack to stereo phono adapter cable User manual Note: The headphones require 2 x AAA batteries (sold separately)