Vandal proof substation for SMC intercom system. Stainless steel front panel and metallic call button. Flush mounting. Includes high sensitivity omnidirectional microphone and 4 W mylar speaker moisture resistant. Valdal proof protection, with front panel thickness of 3 mm, internal metal grill for speaker, stainless steel call button and special torx type screws to secure the front panel. Power supply 24 V DC. Consumption 25 mA / 230 mA. Dimensions 113 x 176 x 1.5 mm.