Self-darkening unit with Solar Panel and Automatic On/Off Optical glass: 1 / 2 / 1 / 2 Viewing area: 90 x 35mm Cartridge size: 110 x 90 x 9mm Arc sensors: 2 Light state: DIN3 Dark state: Fixed shade 10 / 11 – suitable for 50 – 300 amps Operating temperature: -5ºC ~ 50ºC Adjustable angle on the head unit Protective plate, Press card, UV/IR filter Not suitable for laser welding or oxygen acetylene welding Dot not store in a damp or hot environment