• Two independent sensors
• 5-1/4 sq. in. active viewing area
• Switching speed of 0.5 msec
• Water and dust resistant
• Dark to light state delay of 0.2 sec and up to shade 16 U/IR protection
• This filter is solar powered so there is never any batteries to change and has an incredibly clear light state of 2.5
• Replacement number: ARCSM524F

ArcOne® Singles® S240-10 Single Filter, Auto-Darkening Retro Fit Horizontal, Length: 4-1/4 Inch, Width: 2 Inch, Thickness: 0.2 Inch, Shade Number: 10