Compact size Front panel is the size of a typical single gang midsize wall plate Mounting Flush mounts in a single gang electrical box 2.25” deep x 2.00” wide x 2.84” tall minimum or surface mounts in a Viking model VE 3x5 not included, see DOD# 424 Available in 5 standard faceplate finishes Brushed Stainless Steel, Oil Rubbed Bronze, Polished Brass, Satin Black and Satin WhitePNL 40 faceplates Replacement faceplates with matching screws available in all five standard finishes Vandal Resistant Features 16 gauge polished brass or 18 gauge 304 stainless steel faceplate, 316 stainless steel push button, carbon fiber reinforced plastic speaker screen, scratch resistant powder coating, hex drive mounting screws Weather Resistant Features Mylar speaker, faceplate gasket, mic and speaker gasket, internally sealed IP67 push button switch, self draining mic mount and UV stable weather resistant powder coating excluding E 40 SS 304 Stainless Steel faceplate E 40 EWP is designed to meet IP66 Ingress Protection Rating see DOD# 859 for more information Telephone line powered Microphone and speaker volume controls Programmable Intelligent call progress detection for automatic hang up on CPC, silence, busy signal, or time out Selectable auto answer feature for monitoring Programmable VOX mic/speaker switching speed Blue LED helps locate push button, indicate ringing and off hook