This STIHL® Gas-Powered Portable Backpack Sprayer delivers the power of a 2-stroke engine with the portability of a manual sprayer. A low-exhaust-emission, fuel-efficient engine delivers up to 20% better fuel economy than most conventional 2-stroke engines. It's also very easy to use with a one-hand joystick-style control handle, and it provides excellent control over rate and range of spray. Ideal for small tree farms, vineyards and more.