Chamberlain 41A5021-4M-315 41A5021-1M-315 and 50 similar items

If you are not 100% satisfied with your purchase, you can return the product and get a full refund or exchange the product for another one, be it similar or not.
You can return a product for up to 30 days from the date you purchased it.
Any product you return must be in the same condition you received it and in the original packaging.
You must return an item in the same condition as it was received, not used or altered in any way. You must also include, in the same condition as it was received:
All original packaging such as boxes, bags, tags, and UPCs
Accessories such as cords and remote controls
Any electronic or product,
Product Inspection and Testing
All of the returned items we receive are subject to an inspection/testing process. we are committed to high standards of quality; we test all defective items that are returned to us to improve our products’ performances and our customers’ satisfaction. Please allow us up to 2 business days to complete the inspection/testing process from the time we receive the item. Also, please note that any item claimed to be defective and found to be in good working order will be returned to you. In these cases you will be responsible for both the shipping costs.