BLACK+DECKER LSTE525 20V MAX Lithium Easy Feed String Trimmer/Edger with 2 batteries and 30-ft spool
From the manufacturer
Converts from trimmer to wheeled edger;Amp Hour : (2) 1.5 AH
Power Drive Transmission for increased torque
2-speed control for more power or extended runtime.Line Diameter :0.065 inches. Cutting Swath 12 inches
Replacement spool for LST136, LST220, NST2118, ST7700
Auto Feed System replacement spool eliminates time spent hand-winding string trimmers
30-foot replacement line is factory wound for a superior feed