... viewer 1.self-made product 2.ISO9001 3.MOQ:1pc I. Product Characteristics LK -LED film viewer uses high brightness ... , wide brightness adjustable range (3% 100%) do not twinkle, do not dazzling.4,According to the human eye physiological property, on the ... shortcomings of potentiometer after frequent regulation.8,Brightness automatic memory, do not need to adjust again and again.9,Low noise fan, ...