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&deg;F to 86&deg;F Accurate with in &plusmn; 1/2&deg; F with a backlit screen 5-2 day programmable  up to 4 pre-set program a day, up to 20% energy savings, or adjust the heater to fit your lifestyle. 208/240v plus 120 volt heaters with back light 4000 watts at 240 volts or 1,500 watts with 120 volt power supply, Totally Silent operation  Zero clicking noise. A fully electronic thermostat Line Voltage thermostat - 16.8 Amps (Resistive), 2 Wires, Single Pole, Battery Free 3 year warranty (Most Brands arel 1 year)