DEWALT DCST920B 20V MAX Lithium-Ion XR Brushless 13" String Trimmer (Bare Tool) Brushless Motor maximizing motor efficiency and durability Dual 0.080" line with bump feed, with 13-inch cutting swath Variable trigger with speed control Patented gear drive design. With a 20V MAX 5.0Ah battery-DCB205,the string trimmer is easy to maneuver and puts less stress on the user Battery sold separately. Product arrives in two pieces and need to be assembled.RPM 0-4,600 / 0-6,000 rpm Battery & Charger Sold Separately