Wireless stereo headphones with built-in FM radio receiver, microphone (in the transmitter), monitoring feature and smooth volume control. Its headband is lined with soft foam all over. It has a double-sided length control so that it adapts perfectly to the shape of your head. Its large ear pads are lined with synthetic leather which damps external noises. It works well with most TVs, CD / DVD / MP3 / MP4 players, computers and other devices with standard 3.5-mm audio mini-jack or RCA (Cinch) output. Excellent sound quality works excellently while listening to music, watching movies, playing games or having conversations via instant messaging. Technical data: Transmitter: - operating frequency at 88.3 ± 0.5MHz - FM modulation - range up to 30m - power supply: 2 x AAA batteries (not included) or optionally AC adapter 4.5V - plug: 3.5mm stereo or RCAx1 - microphone sensitivity: -58 dB ± 2 dB - microphone bandwidth: 30Hz up to 16.000Hz Receiver (headphones): - soft ear pads - bandwidth: 20Hz - 20.000Hz - range of received frequency: 88 - 108MHz - power supply: 2 x AAA batteries (not included)