RADI STAT-MAN Features: -Two temperature sensors: one in floor, one in thermostat for accuracy and security.-Advanced temperature control ensures total comfort by minimizing temperature variations.-Temperature control: Microprocessor-optimized PIA Heating cycles: 15 minutes Accuracy: ± 0.5ºC / 0.9ºF. Includes: -Ground Fault Circuit Interrupter (GFCI) included. Dimensions: -Width: 3".-Thickness: 2".