Auto Darkening Welding Lens for 2x4 1/4 Welding Helmets - Fixed Shade 10 Auto-Darkening Filter Replacement with True Color Technology - Battery-Free Fast Response (Fits Mask 2x4.25 Inch Welding Hoods)

View Area: 98 x 35mm/3.86" x 1.38" Cartridge Size: 108 x 50.8 x 5mm/4.25" x 2.0" x 0.2" Weight: 1 Ounce Light Shade: 2.5/Dark State: Shade 10 Optical Rating: 1/1/1/2 Sensors: 2 Independent Wide Range Photo Sensors Solar Power, No Need To Change Battery, Completely Automatic, No Switches Or Buttons To Turn On

• 0.0005s Instant Darkening Technology - Reacts Faster Than Welding Arc Ignition
• High-definition lenses can block or absorb more than 99.99% of infrared and ultraviolet rays, which allows us to easily carry out various welding work.
• Its Light Shade state is 2.5, which allows us to clearly observe the working area.
• Two wide range photo sensors are built in with higher sensitivity, which enables the lens to detect an arc strike and trigger the LCD into its dark shade in less than 0.5 milliseconds.
• The battery does not need to be replaced. Every time you strike an arc the solar panels will charge the lens right back up!