Makita XRU07Z 18V X2 (36V) LXT Lithium-Ion Brushless Cordless String Trimmer, Tool Only Makita-built Outer Rotor Brush-less Motor direct-drive system provides increased power and torque Constant Speed Control minimizes reduction in rotation speed under load 2-speed options (Low: 0-5,000 RPM, High: 0-6,500 RPM) allows operator to match speed to application Delivers up to 60 min. of run time under load on low speed using two BL1850 batteries (not included) Zero emissions and reduced maintenance; no need for gas or oil