One handy feature with this impact wrench is that it's brushless. It runs on a rechargeable battery, so it's completely cordless.
From Tooled Up
Milwaukee M12 FIR38LR Fuel 12v Cordless Brushless 3/8" Drive Long Ratchet Wrench No Batteries No Charger No Case
Powertool World
Milwaukee M12 FUEL FIR38LR-0 12v 3/8" Extended Reach Ratchet Body Only