Engineered by a Guangzhou aluminum fabrication facility with over 10 years of stadium-supply experience, this electronic lifting tennis umpire chair replaces manual ladders with a motorized, servo-driven lift system. Built from structural 6061-T6 aluminum alloy, the frame delivers stable performance under outdoor wind loads without tipping. The drive system integrates an anti-drop, self-locking mechanism that prevents free-fall during sudden power outages, meeting the rigorous safety expectation
