Large plastic-bodied headphones, with a top-mounted infrared receiver, through which one listens to audio descriptions. Very bright LED at top of headset is highly conspicuous and indicates power on.
An alternative device to a telephone handset. Headsets require a connection to a telephone, usually through the handset jack (RJ-9) on a corded phone, or via a built-in jack on a cordless or wireless phone.
Headphones with a noise canceling mic, used as an intercom between roadies during the show. Brand names: RTS, Tech Pro and Clear Com. Submitted by Karl Kuenning RFL from Roadie Net.