Wireless stereo headphones with built-in FM radio receiver and smooth volume control. When put on your neck it keeps the headphones stably while walking or jogging. Its ear pads are lined with soft sponge. It works well with most TVs, CD / DVD / MP3 / MP4 players, computers and other devices with standard 3.5-mm audio mini-jack 3.5mm. Excellent sound quality works excellently while listening to music, watching movies or playing games. Technical data: Transmitter: - operating frequency at 88.3 ± 0.5MHz - FM modulation - range up to 30m - power supply: 2 x AAA batteries (not included) - plug: 3.5mm stereo In set cable: mini jack 3.5mm -->mini Jack 3.5mm + RCA - lenght 0,7m Receiver (headphones): - bandwidth:: 20Hz - 20.000Hz - range of received frequency: 88 - 108MHz - power supply: 2 x AAA batteries (not included)