The Set 810 is an Ergonomic TV stethophone system, consisting of a stereo receiver and associated infrared transmitter. Adjustable to the users hearing capacity - for full enjoyment of TV sound. The Set 810 system consists of a TI 810 infra-red stereo transmitter and an RI 810 infra-red stereo stethoset receiver. The TI 810 transmitter is simply connected to the headphone socket of a television set or hi-fi system. The stethoset receiver has a large, easy-to-use volume control.