Mier BW-50WHTR Heater with Thermostat for Small Enclosures, 50W, Mier Products, Inc, Mier ProductsMain Features120V-240V AC, 50/60 Hz, 2.5 amp draw at initial inpushOperating Temperature is -40 to 158?F (-40 to 70?C)Switch off temperature 59?F (15?C)Switch on temperature 41?F (5?C)Weighs 10.8 oz