Enjoy a rich, vibrant sound with the wireless RS 165 Hi-Fi headset from Sennheiser that makes use of a transmitter with a 30 metre range. The transmitter can handle two signals and supports two headsets simultaneously. The closed design headset is perfect for listening to tunes on your domestic network or for watching TV programmes. The circumaural headset has a range of around 18 hours and uses 2 rechargeable AAA batteries.