Customers: Power Save International has a 90 day Energy Reduction Guaranty. If you do not save money on your power bill in the first 90 days, return it for a full refund! Resellers and distributors: Power Save International will exchange any of our Power Save units for another Power Save Unit of equal value. There is a 50% restocking fee assessed for resellers wanting cash refunds. The Shipping Method used by Power Save International is USPS Priority Shipping. All Orders are Processed and shipped in 1 - 3 business Days