The Honeywell CT410B1017 Manual 4 Wire Thermostat is a simple to install unit that s compatible with 120 240 and 227 vac baseboard systems. This manual thermostat s versatility is increased substantially with its implementation of a 2 or 4 wire non polarized connection. Temperature control is further boosted with a dual diaphragm that actively senses. The Honeywell CT410B1017 Manual 4 Wire Thermostat s versatility is only matched by its strength to hold up to an impressive 5 280 W. All of these additions and the thermostat s particularly easy on the eyes design make this the ideal thermostat to utilize in a host of applicable settings.