The DEWALT DCM571 FlexVolt XR Trimmer is fitted with a highly efficient brushless motor with a metal housing for increased runtime, life, durability and efficiency. The variable speed control provides a high/low setting for fast job completion over large areas. The enclosed and durable Xenoy™ battery housing provides increased protection. Includes a brush cutter adaptor kit and a brush knife, for everything from simple grass trimming to heavy-duty clearing work. DCM571X1: 1 x 18/54V 9.0/3.0Ah Li-ion BatteryDCM571N: Bare Unit, No Battery or Charger Specification: Line Cutting Speed: 0-5,100/0-5,600/min.Cutting Width: 38cmLine Diameter: 2mmLine Supplied: 7.5mAssembled Length: 1.8mWeight: 6.6kgThe DEWALT DCM571N FlexVolt XR Trimmer is supplied as a Bare Unit, NO battery or charger.