Gembird WHS-104 headphone

30 - 20000 Hz, 75 dB, input: 100 - 240 V AC, 50/60Hz, 0.2 A / output: 12 V 100 mA, 2 x AAA - UHF/RF Wireless stereo headphones with microphone built into the transmitter
- Active noise reduction technology for excellent audio quality
- Automatic mute (headphones) and power-off (transmitter) when there is no signal
- Can also be used without batteries as a wired headset
- Monitor button allows to shortly mute the music and listen to your surroundings
- Up to 70 meters operating distance
- Comfortable ear cushions and adjustable headband