UTC-60-6520-95 CRYSTAL CARBON MONOXIDE GAS SENSOR: DETECTS HAZARDOUS LEVELS OF CARBON MONOXIDE GAS. WHEN GAS IS DETECTED AN ALARM SIGNAL IS SENT TO THE PANEL AN INTERNAL SIREN SOUND & COMMUNICATIONS AND A RED LIGHT COMES ON. GREEN LIGHT INDICATES DETECTOR IS FUNCTIONING PROPERLY. PLUGS INTO STANDARD AC OUTLET. NOT COMPATIBLE WITH VERSION 1.0 SIMON