The Prowler Series Off-Road helmet from Hobart features a 2-3/8" by 3-7/8" viewing area, with four independent arc sensors that provide continuous arc-sensing capability for out-of-position welding. Prowler helmets weigh 11 oz. and feature solar-assisted, auto-darkening lenses and easy-to-replace lithium batteries that last up to 3,000 hours when MIG welding.