Feature:1. The highly sensitive arc sensor and probe of this product provide professional and accurate protection.2. This welding argon arc welding solar energy automatic charging, without the use of power, is practical and environmentally friendly.3. The welding helmet lens has a clear window and a wide field of watching, which can quickly and reliably filter out welding arc light.4. This welding lens set is easy and safe to operate, and it can be used with different styles of welding masks.5. Using this welder mirror group can be well protected at work to prevent occupational diseases.Specification:Item Type: Welding LensBright State Color Number Grade: DIN4Dark State Color Number Grade: DIN913Dark State Color Number Adjustment Method: Internal control, stepless adjustableDimming Response Time: 1/10000SInduction Sensitivity Control Adjustment: Steplessly adjustableRecovery Time: 0.1S~0.8SPower Supply: battery/solarBuiltin Battery Model: CR2450Number of Batteries: 2 (not included)Rated Capacity of Battery: 1200MAhWhether The Battery Can Be Replaced: YesWorking Temperature: 1065Number of Arc Sensors: 4Infrared/Ultraviolet Protection Class: DIN15SelfCheck Function: YesLow Voltage Alarm Function: YesPolishing Function: YesCutting Function: YesSize: Approx. 60mm / 2.4in 100mm / 3.9inPackage List:1 x Dimming Plate