Heater features stranded resistance copper/nickel alloy wire heating element for longest life, not cheaper etched aluminum foil like other heaters.
Solid State temperature control maintains waterbed temperature within 1/10 of a degree. Cheaper heater controls can vary temperature by 3 degrees, a difference you can feel.
Over-limit switch prevents overheating. For use with Softside Waterbeds.
A hardside waterbed is the old-school waterbed that sits inside of a hard-sided wooden frame bed. This hardside heater can sit directly on the wood base that supports the vinyl water chamber.