The VisionCheck comes with a 30-day Money Back Guarantee. If you are unsatisfied with your experience, you may return the VisionCheck within 30-days. After 30 days, there is a one-year limited warranty on parts and labor. Proof of purchase from an authorized seller (EyeQue.com, Amazon, Kickstarter, Indiegogo, etc.) and product serial number are required for processing a return. Contact support@EyeQue.com for assistance.