Earthwise 10-Inch Cordless Electric String Trimmer is gas-free, rechargeable and quiet. No fumes, no cords. Rechargeable 12 Volt NiCad battery delivers powerful 8,000 RPM. 3-position cutting head adjust for any trimming and edging for a professional yard. Upper handle rotates 180 degrees for the right comfortable hold and control. Auxiliary handle also adjusts front to back and left to right to tackle those hard to reach areas. Flip-down edge guard protects your flowers and perennials while trimming. Semi-automatic line feed eliminates the continued bumping to advance the cutting line. Telescoping shaft adjust to your personal preference. Features a lock -Inch off-Inch switch for safety. Rubber over molded handles for comfort grip.