The HR-150 is the standard unit in the newest generation of Ozonics’ exciting scent elimination technology for hunters and safely (Ozonics products are designed to meet or exceed federal safety standards) utilizes small concentrations of ozone, a known industrial odor eliminator, to eliminate human related odors DOWNWIND. The HR-150 is primarily designed for use in a ground blind achieving near 100% odor removal, but can also be used in a tree stand with nominal 70% success. Product features; one output mode, low battery indicator and green lights for set up/tear down. Packaging contains; One each - HR-150 with rechargeable battery (~5 hr hunt life), battery charger and mounting device for blind and tree.