Video Tenant Station with 3.5'' Display. Digital PTZ while communicating with entrance station. Easily contact guard station. Light and saturation adjustments. Secondary option button triggers a normally open contact on the back of the unit to trigger external devices. Communication: Hands-free (VOX) or push-to-talk (simplex). Mounting: Surface 3-gang box wall mount or desk mount using MCW-S/A (sold separately). Wire Type: 2 cond., solid, non-shielded PE insulation.