ClimaSys PTC heating resistance.::20W, 110-250V AC, 50/60 Hz.::(-40 to 70)°C temp for operation. Electrical connection is cable 2 x 0.75 mm² length is 300 mm.::35 mm DIN rail mounting support.::Extruded aluminium body.::IP20 Protection.::Electrical protection needed, must be installed with a thermal controller.