Area of view: 90 x 35 mm Size of : 110x90x10 mm Arc sensor: two Light condition: DIN 4. Dark condition: set shade 11 Unadjustable shade control Turn on/off power: fully automated Sensitivity control: auto, indefinite UV/IR defense: DIN 16. Solar cells are the power source. rechargeable energy source. No need to change the batteries Transitioning from light to dark in 1/5000s Dark to light: 0.15–0.45 seconds automatically low current TIG: DC ≥20 amps, AC ≥ 20 amps Temperature of operation: -5°C to +55°C Keeping tea: -20°C to +70°C enclosed in a colored box