Technical Specifications: -Power Supply: Solar & Lithium Combination -Filter Size: 4-1/3" x -5 / 9" x 1/3" (110 x 90 x 8mm) -UV/IR Protection: Up to Shade DIN 15 at all times -Light State: Shade DIN 4 -Operating Temperature: 23-131 F -Variable Dark Shade: Shade DIN 9-13 -Switching Time (From Light to Dark): 1/25000s -Delay Time (From Dark to Light): Adjustable 0.15s-0.8s -Sensitivity Adjustable: YES -Shade Adjustable Knob: Outside