The Lumax 12 Volt Cordless Grease Gun is equipped with a commercial grade 12V electrical power system, thus does the work for you. Unlike many cordless guns on the market, this one is compact and balanced. The ergonomic design positions the equipment to support and accommodate the way you work. This allows you to gain access to areas that almost seemed impossible to service with a traditional, manual grease gun. Simply pull the trigger to begin pumping grease. All you need to do is move the coupler from fitting to fitting, and before you know it, your task is complete. Power through clogged or restricted fittings using the powerful 7,000 psi (483 bar) pump head. This powerhouse offers added protection utilizing the built-in Pressure Relief Valve. If the system exceeds safe operating pressure, the relief valve will divert pressure to protect you and your equipment. This gun is ready to work all day, every day.