Capture 4 MP surveillance video through a motorized 2.8-12 mm varifocal lens that lets installers set a wider scene view or tighten coverage on a more distant subject. The fixed dome format keeps the optical assembly contained in a compact surveillance-camera housing while retaining network connectivity for IP video deployments. Infrared illumination supports video monitoring when visible light is limited. The motorized lens is the central operational advantage of this configuration: it allows framing adjustments without replacing a fixed-lens camera. That makes the camera suitable where the final field of view must be refined during commissioning or adjusted after changes within the monitored area. UNITED DIGITAL IPC3634SB-ADZK-I0 combines 4 MP imaging, IR operation, a motorized varifocal optic, and vandal-resistant construction in one network fixed dome camera. Within a fixed-dome camera range, its 2.8-12 mm adjustable focal range distinguishes it from models that use a single fixed focal length. Select it when the installation calls for a dome form factor and needs lens flexibility rather than a permanently fixed viewing angle.