Specifications: Working voltage: 220V-245V Output power: 3-9KW Current: 4.5-13.7A Light output: Max.60W Mode: 8+4 mode; Normal heating temperature range: 40-105 C Overheating protection: Supported Packing size: 24 *26*7cm Packing weight: 1.5kg Packing contents: 1 x Sauna external controller Features: High-tech particleboard, excellent sauna heater external controller. Energy-saving design, 2 working modes to choose from. Overheating protection, safe to use. You can control the lighting of the sauna room, adjust the heating temperature and time, etc. Heat-resistant temperature sensor, length 3m. Compatible with sauna heaters 3-9KW. Suitable for home saunas and commercial occasions. Detailed of the functions of the external controller: 1. Sauna light control: control the on and off of up to 4 lights. 60W lamp in sauna lamp. 2. Two working modes: Mode A: 8 + 4 working hours (maximum working time: 4 hours) Working time: 8 hours, such as B. Branch line: 4:00, heater working time is 4:00-0 :00; is 12:00-4:00 (heating is not working). If you do not want to start heating immediately (it will automatically start heating after a delay of 2 hours). The time is set to 6:00. Mode B: The heater starts working immediately after setting (no working time), the maximum working time is 12 hours. 3. Time setting: Press the up button " or the down button " to set the time. After 3 seconds, the countdown starts from the set time and automatically turns off when the screen displays 0:00. The default time is 2:00. 4. Temperature setting: Temperature range: 40-105, press the up button " or down button " to adjust the temperature. The current temperature will be displayed after 3 seconds. 5. Switch the sauna heater on/off. 6. With temperature sensor: 3m long heat-resistant cable for indoor installation. 7. Overheating protection: When the temperature reaches 150, it will automatically shut down to avoid burns. Reminder function: 1. The screen temperature display "----L" means that the temperature sensor is not connected correctly (or the circuit is damaged) or the temperature is lower than -10. 2. The temperature display "----H" on the screen indicates that the temperature sensor is short-circuited or the temperature exceeds 110. 3. The time is displayed in countdown mode. NOTE: For more information on functionality and installation, please see our English User Manual.