The Solo 451 Motorized Mist Blower Backpack is a motor-driven mist blower that features a 4.3HP low-emission, 66.5cc, and two-cycle Solo fan system and engine. Additional design highlights of this professional unit are quick-release straps and an ergonomic carrying frame. The UV inhibited polyethylene tank has a 3.4-gallon capacity. The multi-position liquid dosage control facilitates a selectable output from 0.12 to 0.89 GPM.