Special Features:

Weatherproof panel microphone; led battery indicator; enough audio power to support three divers; external 12v DC power connection; independent diver and tender controls; hand-help push-to-talk microphone; remote walk-and-talk belt module; tape record jack; 2 and/or 4 wire operation standard; ability to use both dynamic and preamplified diver microphones with a unique circuit that detects microphone type and automatically adjusts volume levels; rechargeable gel-cell type battery automatically recharges while operating the union; voltage is automatically selectable for 110 or 220v AC , 50 or 60hz, with built-in isolation transformer; 9 in height by 14.5 in wide by 10 in depth; 22 lbs

Properties:

A fixed number of components and/or items, not all having the same basic name, utilizing radio frequency electromagnetic waves in space to carry two-way intelligence. Excludes radar set; facsimile set; receiving set, radio; receiver-transmitter, radio; and receiving set, television.