INNOMAX Thermal Guardian Quantum Solid State Waterbed Heater, Full Watt State-of-the-art Ultra sensitive electronic control that holds the temperature to 1/8 degree of set point ensures accurate temperature sensing Certified to the standards of the Underwriter's Laboratories (UL) #1445 for Waterbed Heaters Full Watt Solid State Waterbed Heater for use with minimum 9 depth waterbeds in rigid side box or wood waterbed frames Larger pad with 64-gauge Thermal Fused Duraflex vinyl Unique double mount control EMF Reduced Circuitry Design Comprehensive 5 year limited warranty State-of-the-art Ultra sensitive electronic control that holds the temperature to 1/8 degree of set point ensures accurate temperature sensing Certified to the standards of the Underwriter's Laboratories (UL) No.1445 for Waterbed Heaters Full Watt Solid State Waterbed Heater for use with minimum 9" depth waterbeds in rigid side box or wood waterbed frames Larger pad with 64-gauge Thermal Fused Duraflex vinyl Unique double mount control EMF Reduced Circuitry Design Comprehensive 5 year limited warranty