The LE-842 5 VDC Single-Channel Dry Contact Relay from Louroe is a relay board that provides external digital I/O for the Louroe LE-870 Digifact A IP Microphone and LE-875 Digifact E Outdoor IP Microphone. It allows Normally Open (N\O) and Normally Closed (N\C) dry contact connectivity to trigger external devices such as RF wireless sensors, lights, sirens, security doors, and gates. The relay mounts using included double stick tape.