Zoo Med Repti-Temp RheostatZoo Med Repti Temp Rheostat For manual heat control. With a turn of the knob, you can adjust the temperature of most non thermostatically controlled heating devices! Plug in up to 2 compatible heating items with a combined wattage of up to 150 watts! Provides manual heat control Simple operation For use with most reptile heating devices Turn your heaters up in the winter and down in the summer depending on your inside house temperatures! Great for use