... -made product 2.ISO9001 3.MOQ:1pc portable x-ray film viewer I. Product Characteristics LK ... 100%) do not twinkle, do not dazzling.4,According to the human eye physiological property, on ... poor contact shortcomings of potentiometer after frequent regulation.8,Brightness automatic memory, do not need to ... 55mm6,lamp life: More than 8 hours7,Sentenced to dark degrees:<4.5D8,operating environment:-20°C-40 ...