Movable guard-covers the top of the guide bar and the guard opens as the branch is cut for added protection and convenience. Adjustable automatic chain oiling to ensure optimal lubrication for application. eXtreme protection Technology (XPT) offers maximum protection against dust, debris and liquids for optimal performance in extreme conditions. Items included: 18V (3.0Ah) Li-Ion battery BL1830B, standard charger (DC18SD), battery cover (450128-8), 4" chain (1910V6-4), 4" guide bar (1910W0-3), chain cover (413M40-1), chain edger (198457-8), oil supply (199897-3).