The Eurofase Surface Mount Single Duplex Stack Switch With Weatherproof Cover and Gang Box allows you to control your heater from the outside, and keep your switches clean and safe from the elements. This convenient addition is available in a surface mount application to accommodate your desired outdoor aesthetic and functional requirements. Rigorously tested, this switch is crafted to allow individual control of heat output for each heating element, providing real-time HI/LO control for Eurofase heaters. With duplex switches, this unit allows simultaneous control of two separate elements, providing enhanced flexibility.The Eurofase Surface Mount Single Duplex Stack Switch With Weatherproof Cover and Gang Box allows you to control your heater from the outside, and keep your switches clean and safe from the elements. This convenient addition is available in a surface mount application to accommodate your desired outdoor aesthetic and functional requirements. Rigorously tested, this switch is crafted to allow individual control of heat output for each heating element, providing real-time HI/LO control for Eurofase heaters. With duplex switches, this unit allows simultaneous control of two separate elements, providing enhanced flexibility.