Alemite 596-B1 battery-powered grease gun is designed to dispense petroleum-based greases (NLGI 1/NLGI 2) for general lubrication applications. It features two-speed electronic transmission and a 20 Volt lithium-ion battery and delivers grease at pressures up to 10, 000 psi (pounds per square inch) at a rate of 6.0 oz. per minute at a high flow rate setting and 4.0 oz. per minute at a low flow rate setting. This cordless gun provides maximum power and pressure - it can dispense up to 24 cartridges of grease per charged battery at low speed and up to 23 grease cartridges at high speed. Its fiber-reinforced nylon housing provides for superior impact and wear resistance and its patented airflow management system optimizes motor and transmission life. This battery-operated grease gun has a convenient 3-way loading - cartridge, bulk, or suction. The featured patented automatic universal follower results in no need to Flip the follower when changing loading methods. The 36 inch high-pressure whip hose makes this grease gun easily maneuverable in tight and hard-to-reach spots. The 596-B1 grease gun comes with a 110 V/60 Hz battery charger (343500), two 2, 500 mash 20 V Li-ion batteries (343291), and a molded carrying case. alemite cordless grease guns offer the highest grease delivery of any single-speed guns in the market. Our patented design featuring the motor in the handle provides excellent balance and Alemite glass fiber reinforced housing is extremely durable and damage resistant.