20V Max Lithium String Trimmer, Runtime Extender Technology, Accelerator, Override Extender, Tackle Brush & Weeds Faster, 12" Swath, Speed Control, Power Command Line Feed .065" Line, Patented Gear Drive Transmission, Maintains Constant Speed Wont Slow Down During Trimming, Wheeled Edge, Uses One 3.0Ah Battery Pack, Included, For Replacement 2.0ah Battery Use TV #189-554 & For Replacement Pre-Wound Spools Use TV #722-702 Or TV #149-106.
