Vandal Resistant Features: 14 gauge louvered 316 stainless steel faceplate with permanent laser etched graphics. Speaker/mic screen. Heavy duty metal keypad buttons and T-10 Security Torx drive mounting screws.Weather Resistant Features: Marine grade 316 stainless steel faceplate and screws. Keypad internally sealed per IP67. Mylar speaker. Self-draining mic mount. Faceplate, mic and speaker gaskets.Two sets of SPDT 2 Amp relay contacts for door/gate or camera controlOptional RC-4A for Secure Remote Relay C