Module guarantee

100% Satisfaction Guarantee

We want your experience with Previlli™ to be worry-free, which is why we offer full refunds (less shipping) within 120 days of purchase if you don't feel the difference. In order to obtain a refund, please email us at support@previlli.com with your order number and contact information, and we will get back to you as soon as possible. We love feedback! It's how we make our products better, so please let us know what you like or dislike about Previlli™.