The Earthwise 12" cordless electric string trimmer has a fast-charge, rechargeable 20-Volt, 2.0 Amp lithium-Ion battery, delivering 8,500 RPMs of power for efficient, powerful trimming. It features an adjustable cutting width of 10" to 12". The 3-position cutting head adjusts for your specific trimming and edging needs. The flip down edge guard protects what you don’t want trimmed, leaving you with the look of a professionally maintained yard. An upper handle rotates 180 degrees for the right comfortable hold and control. The auxiliary handle also adjusts front to back and left to right so those hard to reach areas are easily managed. A telescoping shaft adjusts to your personal preference and the rubber over molded handle provides a comfortable grip. Automatic line feed eliminates the bumping action to advance more line. No gas, no oil, no fumes. Earthwise is the Clean Air Choice!