QUICKLY ELIMINATES ODORS: It eliminates odors quickly, usually within 1 - 6 hours, depending on odor impregnations. 2-WAY OPERATION: Gives you the option of 110-120 volt AC adapter (Included) or a 4 C batteries (Not Included) for optimal portability. KILLS ODOR SCIENTIFICALLY: Utilizing strictly controlled molecular science, it takes normal oxygen molecules (O2) and gives them a small but powerful, electrical charge. This temporarily creates oxidizing ozone (O3) molecules. When they come in contact with odor and pollution molecules, the O3 penetrates them. This effectively destroys the bad molecules by altering their chemical make-up, thus abolishing the odor. 2 YEAR WARRANTY: We don't just build products that solve problems; we build quality products designed to last. We are confident in our product and offer you the PEET Dry Factory Warranty. Simply register your product within 10 days of your current or future purchase to take advantage of this benefit. SAFE, SILENT OPERATION: For your convenience, this product is made to operate without making a sound and it turns off automatically. To test, place dryer in your footwear before you go to bed and check for any dampness in the morning. Your footwear should be refreshing, dry, and ready to accompany you on the adventures ahead.