Safe-T-Gard SG1 condensate overflow alarm sounds a buzzer and flashes an LED when an overflow switch or condensate pump cuts the thermostat circuit. Works with most 24-volt overflow switches and pumps. Simple 2-wire design allows quick & easy installation. Comes pre-wired with 4-foot 18 AWG lead wires and 2-sided tape. Additional two-strand T-Stat cable can be used to locate the alarm anywhere in the structure.