Camera names may include the abbreviations HL, VF, and HLVF.
HL means hybrid light: the camera can switch between infrared (IR) and white LED illumination to capture color footage at night.
VF means varifocal: the camera is equipped with a lens that has a variable focal length, allowing users to adjust the focal distance and magnification.
If the camera name includes both HL and VF, it features both hybrid light and a varifocal lens.