The Edwards 5533MD Adaptatone Signal is an explosionproof, heavy-duty industrial, tone-selectable, signaling device capable of producing volume-controlled, high-decibel tones. The signal accepts up two contact closures and delivers one audible output signals selected from the 55 tones available. The  tone may be selected by setting miniature switch within the unit.

The 5535MD Adaptatone mounts on any surface using three bolts.

The 5533MD Adaptatone is designed for hazardous locations applications requiring electrical supervision of signaling circuit field wiring.. Typical applications include signaling use in mining, granaries, flour mills, tankers, refineries, laboratories, spray booths, and other hazardous locations.