Black & Decker STC1820EPCF-B1 18V 2.0 Ah 28cm Cordless Grass Trimmer Specifications Voltage : 18 V Battery Type : Li-ion Capacity : 2.0 Ah Battery : 1 Cutting Width : 28 Cm No Load Speed : 5500 – 7400 Rpm Run Time : 20- 25 min Charging : 5 Hour Edge Facility : Edging Wheel Secondary Handle : Yes Adjustable Handle : Yes Telescopic Shaft : Yes Features Fast Cutting – 28cm Cutting Swath For Fast Job Completion Over Large Areas. AFS®: Automatic Single Line Feed System, Saves You Time And Effort New & Improved Flip To Edge Mechanism – Easily Convert From Trimming, To Wheeled Edging Mode Lithium Technology – 18V 2.0 Ah Lithium Battery For Longer Lasting Fade Free Power Without The Hassle Of A Cord Powered By E-Drive – High Torque Gear System Powers Through Even The Toughest Overgrown Areas Quickly Without Clogging Optimal Comfort – Easily Adjustable Second Handle And Telescopic Tube For Greater Control And Comfort Power Select Run Time Extender – Increase The Power For Tough Overgrown Areas Or Reduce The Power For Lighter Tasks To Extend Battery Run Time Precise Edging – Precision Edging Guide Wheel For Perfect Lawn Edges Every Time Speed control & runtime extension mode: This string trimmer gives you the choice to operate at a more efficient speed to extend the runtime for larger jobs, or accelerate the trimmer speed for high-performance cutting – To extend runtime, pull the speed-control switch back toward the battery into position #1. This mode is best for larger projects that require more time to complete. – To accelerate the trimmer, push the speed-control switch forward toward the trimmer head into position #2. This mode is best to cut through heavier growth and for applications that need higher RPM.