Product details:

This simple control is easy to install and has a built in GFCI and 15 amp relay so you can control up to 150 sq. ft. of 120V or 300 sq. ft. of 240V SunTouch mats. Senses the FLOOR Temperature Using the INCLUDED 15 ft floor Sensor Wire and has Built in Ground Fault Protection with no need for an additional GFCI circuit in most areas. Large temperature setting dial and 15 Amp capacity to control up to 150 SF of SunTouch 120VAC mats per control 300 SF of 240v mats. No Programming necessary. On Off switch is located on side of control as is the GFCI Test button.