Powerful motor delivers 10,000 max psi to power through clogged grease fittings. High-volume pump pushes up to 5.0 oz/min high-flow applications. Up to 16 cartridges per charge with a single DEWALT 20V MAX Battery (4.0 Ah). Variable speed trigger offers precise control of the grease flow. 42" extra-long and flexible hose designed for reaching hard to access grease fittings. Bright LED light assists in locating hard to see grease fittings in low-light situations. Innovative pump filter screen prevents dirt and contamination from clogging the pump mechanism. Integrated no-mar foot design allows operators to rest the tool on flat surfaces. Air-bleeder valve assists in pump priming after cartridge changes