eXtreme Protection Technology (XPT) offers maximum protection against dust, debris and liquids for optimal performance in extreme conditions. 4-stage impact speed selection + TEK 1, TEK 2, 'Cam-Out' and Bolt modes to ensure precise fastening and prevent damage to fasteners. 'Cam-Out' elimination mode operates at low speed until fastening begins to eliminate 'cam-out' and cross-threading. Bolt mode with 3 forward and 3 reverse auto stop modes stop impact and rotation to ensure consistent and precise fastening. Includes: 40V Max (4.0 Ah) Li-Ion battery, rapid charger, battery cover, hook, plastic carrying case.