24 WATT High visibility temp setting with easy-to-view sliding scale tells the exact temperature setting. Click-set temperature dial to accurately set temperature to plus/minus 1 degree fahrenheit with every click. Advanced mounting bracket, which securely attaches to glass and provides three window positions to view temperature display. Triac equipped thermostat which switches heater on and off with lower voltage for superior reliablity and performance. New, mesh heating element with mica core, coupled with epoxy fill ensures the most efficient heat transfer. Led on/off light to indicate clearly when the heater is operating.