Area of view: 92 x 42 mm Size of cartridge: 110x90x9 mm Arc sensor: two Class of optics: 1/1/1/2 Light condition: DIN 4. Dark state: variable shade, 9–13 External, variable shade control Turn on/off power: fully automated Control of sensitivity: auto UV/IR defense: DIN 16. Power source: two CR2032 lithium batteries plus solar cells Transitioning from light to dark in 1/15000s Timing of dark to light: 0.1-1.0 auto low current TIG: 10 amps DC and 10 amps AC Function of grinding: yes Yes, a low volume alarm Temperature of operation: -5°C to +55°C Keeping tea: -20°C to +70°C enclosed in a colored box