The Aquacom® ComBox is a compact, self-contained one diver air intercom.   It allows clear communications using a powerful 20-watt amplifier and a powerful front panel speaker, "Silver Bullet". ComBox is rugged and offers many features others dream about.  The Push-to-Talk (PTT) control is an industrial vending machine switch.  It is designed to be pushed all day long.  The front panel speaker is small but packs a lot of sound.  In all, the ComBox is the finest one diver box on the market.