The SRM-230 is a top of the line home trimmer with professional features. Its high-output Power Boost Tornado™ Engine provides ample power to the cutting head through its strong 4-layer cable and all-metal gearbox. Other features include a heavy-duty air filtration system, padded edging-style left handle, debris shield w/cut-off knife, and vibration reducing hand grips, die-cast fan cover and engine vibration reduction shocks. Shoulder harness and brush blade is optional. The SRM-230 is backed by a five year consumer warranty and includes operator's manual and engine oil. All ECHO engines are certified with the longest engine durability rating. California Certified