- Vandal Resistant Features: 14 gauge louvered 316 stainless steel faceplate with permanent laser etched graphics speaker/mic screen heavy duty metal �Call� button and T-10 Torx security mounting screws.- Weather Resistant Features: Marine grade 316 stainless steel faceplate screws and push button switch. Switch internally sealed per IP67. Mylar speaker. Self-draining mic mount. Faceplate mic and speaker gaskets. Weather resistant powder paint on optional VE-5�5 (DOD# 424).- Volume adjustments for microphone and speaker- Two Watt amplifier to drive speaker- Power supply included- Blue LED indicator- Extended temperature range of -15�F to 130�F- Optional VE-5�5 surface mount back box (DOD 424)- Optional MSB-30-EWP is designed to meet IP66 Ingress Protection Rating (see DOD 859 for more information)