The Sennheiser RS120 wireless headphones offer a detailed and well-balanced sound with great bass response. This system is an ideal choice for all types of music and TV applications. The headphones are lightweight and comfortable and fit easily onto the base for charging and storage. The RS120 headphones have a wireless range of up to 100 metres and a frequency response of 22 to 19,500 Hz. Sennheiser 2 year warranty.