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.