Control switch 2-pole, imprint 'Heating', '0' and '1' AP W.1 polar white. Control switch 2-pole with imprint - Heating emergency switch - 0 - I - AP with lens, IP55. For control circuit, with red LED unit 230 V for switch/button, with N terminal, with plug-in terminals, with mechanical coding of the rocker holder, which only allows the rocker to be plugged onto the insert in the correct position, with an entry for 2 cables and an entry for cable or pipe, full-surface seal under the housing base to seal the rear of the housing, easily accessible, funnel-shaped mounting holes in the housing, a Wago 2-wire connection terminal for wiring included, two snap-in locations for Wago 2-wire connection terminals in the housing base, plenty of space for wiring under the bases of the inserts (hollow floor), easy installation of the insert in the housing by snapping it into place, secure fixing of the frame to the housing via bayonet quick-release fastener. Not suitable for heating systems > 50 kW. Housing screws made of stainless steel. Surface-mounted installation. Material: plastic, thermoplastic, impact-resistant.