RLC-811A provides you with a marvelous visual experience day & night with 4K Ultra HD, spotlights & color night vision. You can get accurate real-time alerts when humans and vehicles were detected around your house. Stop the crime before it happens. Besides, its motorized varifocal lens provides a viewing angle of 31°~105°, and its 5X optical zoom allows you to zoom in for astonishing details or zoom out for maximum coverage. You can also use it to record fun time-lapse videos!