4000 series IK09 4-button call module for GSM system. Blue LED name cards backlighting. Connection via terminal board of optional button modules for a total of 24 push-buttons. AISI 316 brushed stainless steel plate (marine grade) that provides durability in installations subject to atmospheric agents and in the vicinity of marine environments. Vandal resistant plate with IK09 and IP65 protection rating. Operating temperature -20°/+60°C. Dimensions 103x120x43mm. 1 module.