For system design. The rocker is plugged onto the 1-way button module. To be completed with: Basic button module, 1-way system design MEG5110-60.. Comfort button module, 1-way system design MEG5111-60.. Wiser button module, 1-way system design MEG5113-60.. Plus extension, 1-way system design MEG5119-60.. Material: painted thermoplastic. Color: stainless steel.