With the on-camera technology of analyzing person and vehicle shapes, RLC-511WA offers accurate detections, thus greatly reducing the false alarms on trivial objects’ movements. Once an intruder is detected, the camera’s spotlights and siren will be triggered or manually activated to warn off the would-be criminal. Built-in mic & speaker allow you to listen and talk back to whoever the camera catches in real time. RLC-511WA provides you with a clearer visual quality & smoother live viewing experience. When daylight is out, RLC-511WA with built-in spotlights continues to record in full color. Its motorized varifocal lens provides a viewing angle of 27°~96°, and its 5X optical zoom allows you to zoom in for astonishing details or zoom out for maximum coverage.