This popular, two-channel listening system features a rack-mountable modulator and stylish, lightweight, under-the-chin style receivers. This turnkey system package is ideal for providing language interpretation, hearing assistance and private listening in courtrooms, military installations, embassies, consulates and political offices. This easy-to-use infrared system ensures private and secure transmission within the listening area. Meets ADA accessibility requirements. Up to 28,000 sq ft coverage in single channel mode (with WIR RX22-4 receiver). Supports additional emitter for additional coverage area. Adjustable volume control. Resistant to high-efficiency lighting interference. No radio license required. 5 year warranty.