Sennheiser IS410 Assisted Listening System The IS 410 is an ultra-lightweight infra-red stereo stethoset headphones system, enabling the user to individually adapt the volume of TV sets, radios and hi-fi systems to his or her hearing ability. The transmitter is easily connected to this equipment and transmits crystal-clear audio within a room. Operation of the stethoset headphone system is easy and intuitive, with the headphones switching on automatically when they are put on. Balance and volume are set directly on the stethoset headphones. The transmitter features a compression button for further enhancing speech intelligibility.Key Product Features: Ideal for TV sound transmission Cordless infra-red system with excellent sound quality Transmits sound within a room, at a distance of up to 12 meters Balance control on the headphones for separately setting the volume level for the left and right ear Compression function ensures superior speech intelligibility Superior transmission reliability due to 2.3/2.8 MHz carrier frequencies Lithium-Ion rechargeable battery pack for up to 16 hrs. of audio enjoyment Transmitter recharges the headphones plus an additional accupack Headphones automatically switch on and off when they are put on/removed Includes short instructions for quick set-up Very lightweight stethoset headphones, extremely comfortable to wear even for extended listening Ideal for wearers of glasses What's In The Box: 1 RI 410 stethoset headphones 1 TI 410 transmitter 1 BA 300 Li-Ion accupack 2 pairs of replacement ear cushions 1 mains power supply 1 TV RCA adapter 1 connection cable with two 3.5 mm stereo jack plugs and one adapter to ¼“ (6.3 mm) jack socket