The BLACK+DECKER LSTE525 20V Max Lithium Easy feed String Trimmer/Edger + 2 Lithium-Ion Batteries is part of the 20V Max System; 1 System - Endless Tasks. Power for your Style. This tool is designed for trimming areas of overgrowth after mowing, as well as edging along borders, sidewalks, and flower beds. It features the Power Drive Transmission which increases torque for more cutting power at the string, and the 2-speed control lets you choose between more power or extended runtime. It easily converts from trimmer to wheeled edger. This unit features easy feed which allows you to advance your line with the push of a button with no bumping required. It has a premium micro texture soft grip that provides comfort and control while using the tool, with adjustable height and handle for ideal user comfort. Cutting swath of 12 inches; Line Size - 0.065 inches; RPM - 5,500/7,200; Replacement Spool - AF-100. Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18. Includes: (1) LSTE525 20V Max Cordless Trimmer/Edger, (2) LBXR20 20V Max Lithium Batteries, (1) Charger, (1) AFS Spool, (1) Guard.