The phrase "high beam" refers to the brightest setting on the headlights of a vehicle. When you turn on the high beams, it produces a stronger and brighter light to help you see better in the dark. Full definition
Our example was outfitted with all sorts of luxury amenities, including full LED adaptive headlamps with automatic high beam control. (cnet.com)
Our test car was loaded with all the (safety) features — front and rear parking sensors, blind spot assist, LED headlights with high beam assist, and adaptive cruise control. (drivemag.com)
Korean version equipment includes auto high beam, lane departure warning, blind spot detection, and electric park brake. (en.m.wikipedia.org)