Milwaukee Powerstate Brushless Motor provides more power, more run-time, and longer life. The brushless motor was built and optimized specifically for trimming applications and provides up to 6,200 RPM. Features high and low speed settings with a variable speed trigger. High-speed provides the power to take on demanding applications, and low-speed maximizes run-time while having plenty of power for grass trimming. Adjustable Cutting Swath: 14 In. for maximizing run-time and 16 In. for increased clearing capacity. The Easy Load Trimmer Head delivers an easy line loading experience and the ability to load up to 25 Ft. of trimmer line in under 30 seconds. The Milwaukee RedLithium Battery Pack is the most durable pack on the market. RedLink Plus Electronic Intelligence and M18 RedLithium High Output battery enables advanced communication between your batteries and tools, allowing for unmatched levels of performance, protection, and productivity. This cordless string trimmer is a part of the M18 System.