Williams AV receivers enable your listeners to pick up audio from a compatible transmitter. Receivers are designed to be small, light-weight and portable so that they are easy for a listener to hold, clip onto a belt, or put in a pocket. Williams Sound receivers can use infrared or radio frequency, can be multi or single-channel, and can even function as two-way transceivers so as to allow back and forth discussion between listeners and guides. Build your perfect tour guide or assistive listening system from scratch or add receivers to your current tour guide or assistive listening package to expand your system for more listeners and more functionality!