The Videx VR4KBM-6 is a vandal resistant VR4K series button expansion module with 6 call buttons. 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 buttons can be engraved with a flat number or name. 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 6 VXSSB vandal resistant call buttons Buttons can be engraved with a flat number or name 316 grade brushed stainless steel front fascia IK09 impact protection; IP55 fascia and IP65 buttons High contrast yellow bezel button version available (VR4KBM-6/Y) Compatible with all 4000 series surface and flush back boxes and front support frames Technical specifications Part number: VR4KBM-6 Number of buttons: 6 Button connections: 2 connection terminals per button Material: 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