I received this as a gift. I already had one. I never even opened it. The OZ NFuse Ozone Sprayer transforms tap water into a powerful, effective and highly economical means of destroying odor-causing bacteria - deodorizing virtually any surface or area and reducing odor-causing bacteria by up to 99% in minutes! The one-button design activates the ozone charging system, infusing tap water with ozone technology in under 90 seconds! The surrounding orange light indicates battery life in 25% increments and uses a standard micro USB charging port located on the back of the bottle for quick and easy recharging. The revolutionary InfiniCote 360 nozzle creates an ultra-fine mist for maximum coverage with increased control and even works upside down, making it easier than ever to spray boots, pants, or anything below the knee.