The VeriFact 535 from Louroe is a two-way speaker/microphone designed to interface with various types of audio/video transmission systems. It provides full-duplex bidirectional audio with the receiving source, such as an NVR, PC soundcard, IP network camera with audio, or video server with audio. The VeriFact 535 integrates a 1' lighted, vandal-resistant call button with a normally open momentary 'dry' contact output that can be connected to an alarm input, doorbell circuit, and more. The VeriFact 535 can be used for partial outdoor applications such as mounted on an outdoor exterior wall. But please note, it cannot be mounted in locations that are susceptible to excessive direct water contact.