The Sennheiser RS120IISEC wireless headphone system offers high quality audio transmission for television with minimal set-up requirements. This wireless TV converter DAC system operates in the 2.4 GHz frequency band and delivers clear sound with a range of up to 100 metres outdoors. The headphones feature closed, wrap-around earcups that effectively isolate ambient noise while providing a comfortable listening experience. Audio is transmitted via a dedicated base station that connects to your TV via optical, coaxial or analogue RCA inputs and supports various audio configurations. The base station has an integrated charging station for the headphones so that they are ready for use when needed. The rechargeable battery provides around 20 hours of continuous use on a full charge, with a full charge cycle taking around 3 hours. The headphones utilise Sennheiser's proprietary Kleer wireless technology, which maintains audio quality comparable to wired connections while eliminating signal interference from other household devices. The sound reproduction covers a frequency range from 20 Hz to 20,000 Hz and is suitable for TV dialogue, music and movie soundtracks. The system includes automatic frequency management that selects the clearest available channel for optimum performance. Controls on the right ear cap provide volume control and power management functions. The headphone design features an adjustable headband with padded cushions and swivelling ear caps for a perfect fit and convenient storage. Materials used include durable plastics, metal components in the headband construction and leatherette ear pads with replaceable foam cushions. The base station measures 18.5 cm in width, 6.5 cm in height and 15.5 cm in depth with a weight of 450 grammes. Each headphone weighs 290 grammes without battery.