The cutting-edge PPA T45 models take hearing assistance to a whole new level, it feature high-quality RF  audio performance that you’ve come to expect from Williams Sound. It also offer an adjustable RF output and a sleep mode for energy conservation. It’s the technology that takes the guesswork out of complex audio installation. With an operating range of up to 1000 feet, the PPA T45 models are ideal for auditoriums, or other large venues where superior coverage is essential. Made in the USA.