Schluter® DITRA-HEAT-E-RT TOUCH PROGRAM THERMOSTAT WHITEThe E RT is the programmable thermostat most homeowners actually want a clean touchscreen, up to six schedule periods per day, and no app or cloud dependency. Set it once and forget it. 3. 5" LCD touchscreen with setup wizard supports 120V and 240V systems up to 15A with built in Class A GFCI Six programmable periods per day with weekday weekend scheduling floor sensor included with your heating cables, plus optional ambient temperature limiting Fits