Luxury totally silent Line Voltage Thermostat for electric heaters - Stelpro STE402P+W Digital 5-2 Day Programmable thermostat. Single Pole Controls heaters up to 4,000 watts, 240 v, 208 v, & 120 volt thermostat, A temp range of 37°F to 86°F Accurate with in ± 1/2° F with a backlit screen