The RYOBI 40V HP Brushless 16" Carbon Fiber Shaft String Trimmer Kit delivers more power than a 27cc gas trimmer, making it a true gas replacement. 40V HP technology combines a powerful brushless motor, advanced electronics, and high performance lithium technology to provide more power, runtime, and durability with over 45 mins. of runtime using a 40V 4Ah battery. Save money, time, & space with attachment capability & transform your string trimmer into a variety of tools. This trimmer is compatible with RYOBI EXPAND-IT attachments & other universal attachments to take on any job around the yard. Tackle thick weeds & grass with the adjustable 14"-16" cut swath. Easily optimize for runtime or performance with the tool free integrated sliding guard, allowing you to quickly adjust your cut swath. This trimmer also has a durable carbon fiber shaft for a lighter weight trimming experience. Achieve max. control with the variable speed trigger & quickly change the speed with the 2 speed switch for optimal power/runt