LIFETIME GUARANTEE. Same Day Priority Mail Shipping. You will receive a 10% refund for your old timer. We pay the core shipping! Ships Priority Mail Same Business Day! We accept returns! LIFETIME GUARANTEE "Outstanding seller who stands by his products." Please match part numbers exactly...contact us with your model number, we are happy to help promptly! LIFETIME GUARANTEE means that if the timer fails, simply contact us, return it to our warranty center, and we will fix it or replace it. Regardless of how long ago you bought it, we will fix it or replace it. Lifetime guarantee limited to the original purchaser. Customer pays shipping to us, we pay return shipping. This warranty is effective only in the United States and it's territories, AK & HI. The warranty is void if the cover is removed or if the the timer is tampered with in any way other than what is necessary for installation.