Aleko Coasts 9KW Sauna Heater With CON 4 Outer Digital ControllerCOASTS sauna heater is reliable, economical and durable. The heater will heat up according to the user pre set working timer and temperature by timer and thermostat. The factory default working time is 45 minutes. This heater is designed with a high temperature cut off safety device. When the room temperature is too high, it will automatically turn off. Control the heat and time with the CON 4 outer digital controller. You can set a maximum of 4 hours