PID control Single pole, single throw (SPST) switch type Surface mount with wall plate included Easily adjustable dial Digital room temperature display, illuminated on setting 5°C to 30°C set temperature range Temperature swing adjustment (using DIP switches) between a 0.5 °C and 1°C. Electronic room thermostat with digital temperature display, providing automatic temperature control for all central heating applications. Simple to install surface mount design, with electronic accuracy to improve system efficiency and help reduce running costs. Features: Operating Voltage: 230V AC Frequency: 50Hz Installation Type: Surface Earth Class Rating: Class II Operating Temperature: 0°C to 40°C Connection: 3 Wire ErP Product Class: Class 1 Mounting Hole Centres (mm): 60 Switch rating: 6A Resistive, 2A Inductive Dimensions: Height 86mm, Width 88mm, Depth 38mm. Output LED (illuminated on call for heat).