Lithium battery powered with solar backup Up to 5000 working hours Lens powered by solar cells with no need of battery changes

Model: ADF DX-400SViewing Area: 91×41mmSize of Cartridge: 110×90×9mmArc Sensor: 2Light State: DIN4Dark State: Variable shade9-13Power Supply: Solar cell&lithium batterySensitivity Control: AdjustableUV/IR Protection: DIN16Switching Time: 1/25,000sDark to Light: 0.2-1.0s AdjustableGrinding:YesLow Volume Alarm:NoOperating Tep.: -10°C~+55°CStoring Tep.: -20°C~+70°C

auto darkening welding helmet