AP AP-3301 light control welding mask

Bright state shading number: DIN4
Dark state shading number: DIN9-13KGN (stepless adjustment)
Response time: {0.1MS (under normal temperature)
Return time: fast gear 0.5S slow gear 1.5S
power supply: two 3A alkaline batteries and Solar cell (at least 1000 welding hours can be used)
Working temperature: -5C—+55C
Window size: 90*40mm
Ultraviolet transmittance: 313NM{0.00006%
Infrared transmittance: 780-1300NM{0.003% 1300-2000NM {0.009%
weight: 570g