The Videx VR4KBM-4NP is a vandal resistant VR4K series button expansion module with 4 call buttons, each with its own illuminated nameplate window. It is used with VR4K audio and audio/video speaker modules (VR4KAM, VR4KAMK, VR4KAM2W and VR4KGSM) to give a Videx door entry panel the number of call buttons it needs.The nameplate card inserts can only be changed from the inside, which makes them highly resistant to vandalism. The fascia is 316 grade brushed stainless steel and the module fits the full range of 4000 series surface and flush back boxes.Key features 4 VXSSB vandal resistant call buttons, each with a nameplate window Nameplate card inserts changed from the inside only LED illuminated nameplates 316 grade brushed stainless steel front fascia IK09 impact protection; IP55 fascia and IP65 buttons High contrast yellow bezel button version available (suffix /Y) Compatible with all 4000 series surface and flush back boxes and front support frames Technical specifications Part number: VR4KBM-4NP Number of buttons: 4 Nameplates: 4 (plus 4 card inserts) Nameplate illumination: 12 VDC white LEDs Button connections: 2 connection terminals per button Material: 2.5 mm (12 gauge) 316 grade vertically brushed stainless steel Protection: IK09 impact rating; IP55 (stainless steel fascia), IP65 (VXSSB buttons) Compatible speaker modules: VR4KAM, VR4KAMK, VR4KAM2W and VR4KGSM Module size: 103 (W) x 120 (L) x 28 (D) mm (1 module 4000 series) Working temperature: -20 °C to +60 °C