This red illuminated button is mounted on a metal plate that can be secured to a wall near the door it effects. The wide operating temperature range makes it suitable for a number of environments. Durable stainless steel plate 1M cycles min. rated switch life Single pole NO/NC momentary contact switch 1.2W lamp, 12VDC (60V max.) Contact rating: 300VAC/3A max. Operation Temperature: -20° C ~ 55° C (-4° F ~ 131° C) Dimensions: 120mm x 76.2mm x 82mm (4.72″ x 3.00″ x 3.23″)