20v max, lithium-ion grease gun, 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 & 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 & 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.