Key switch, e.g. for switching alarm systems or for gate control. Robust metal housing with stainless steel cover for surface mounting. Prepared for the installation of a standard profile half cylinder (30/10). Switching or pulse contact selectable (3x changeover contact, max. 30V DC / 500mA). Incl. buzzer and 3 LEDs. Dimensions: 78 x 123 x 66mm.