The SMQ-1 is a single ear headset for the Clear-Com Que-Com system.The Que-Com is a high-performance, economical party-line communications system offering a wide frequency response and high audio output and featuring a rugged, all-metal die cast beltpack with belt clip. The intercom provides an individual volume control and mic on/off switch for each station with a permanently attached, rugged, noise-isolating headset. It interconnects with standard mic cable. Que-Com is compatible with all Clear-Com systems. Available with single-ear headset (SMQ-1) and double-ear Headsets (DMQ-2). The PK-7 is a suitable power supply option.Main Features:Solid state, IC amplifiers, current-limited with reverse-polarity and short-circuit protectionSignal to noise ratio:65 dBDistortion: