SunTouch SunStat PRO II Programmable Floor Heat Thermostat Large LCD Backlit Display clearly shows time & temperature details. Any button turns on light Built-in 15-amp relay controls up to 150 sq. ft. @ 120V / 300 SF @ 240V Push buttons allow easy control of Floor or Air Temp (or both) with Included 15 Ft Floor Sensor wire SmartStart? Technology ensures programmed temperature is reached at scheduled time 3 year warranty ensures durability & GFCI protection is built-in for safety