BLACK+DECKER LST300 Weed Whacker 20-volt Lithium Ion battery pack for 33% more run time The PowerDrive Transmission delivers more power from the motor to the cutting string so you can get the job done faster Automatic Feed Spool ensures continuous work without bumping. Line diameter: 0.065 inches 2-in-1 trim or edge - easily converts from trimmer to edger in seconds Lightweight design with adjustable handle and height positions One 20v Lithium battery pack for 33% more run time Runtime Extension Technology for long run time Patented Power Drive Transmission Automatic Feed Spool - no need to stop and bump Pivoting handle and adjustable length