The heating thermostat is manual switch and knob operation, acquire the room temperature with its floor sensor. Features: It controls the temperature with an NTC sensor placed externally. Indicator lamp is light when heating is on. With manual switch and knob for easy operation. Can fit into a standard single switch backbox. Full installation and operation instruction included. Specifications: Material: PC Color: White Voltage: 230VAC Power Consumption: 5W Temperature Control : 5~40 Temperature Limit : 25~55 Energy-saving Temperature: 5 Temperature Switch Deviation: 0.5K Ambient Temperature: -5~50 Shell Protection: IP20 External Sensor: length of 3.0m Item Size: 86 * 86mm / 3.39 * 3.39in Package Weight: 210g / 7.41ounces Package Size: 100 * 100 * 60mm / 3.94 * 3.94 * 2.36in Packing List: 1 * Manual Thermostat 1 * Sensor Cable 2 * Mounting Screws 1 * User Manual