Vandal Resistant Door Station - The LS-NVP is a vandal proof and weather resistant sub station designed for use with Aiphone s LAF-C,LEF, LEM, AP-M and MP-S systems. The LS-NVP is constructed of 11 gauge carbon steel with a whitepowder-coated finish. It can be flush mounted using a standard three gang electrical box or surface mounted with the SBX-NVP. The unit includes tamper proof screws and tool for installation. Communication at the master is push-to-talk, release-to-listen, and communication at the door station is hands free.