The Thermostat Plus is designed to control heating appliances in dry environments and comes ready to use (no electrician required). Heat source is plugged into thermostat by a power cord. Temperature is measured by the probe which signals the thermostat to simply turn on and off as required to maintain desired temperature. The stainless steel probe registers readings between 0-40°C. The Thermostat Plus is both efficient and economical and can be used to control Heat Pads, Heat Cords and Heat Globes.