Eventually I bought three receivers after problems began. I installed them in late spring 2012 and was very pleased to see myself able to open the garage doors form 300 feet plus. When fall fell and the temps dropped below 55 degreesF we began to have problems getting the either door to open. Mostly it was one so I ordered another receiver and installed it. Still problems. Next as the year progressed temps dropped more and both doors quit working entirely. Although they work fine when the temperature rises above 55f. I had to go back to the old remotes and receivers that had become problematic in any conditions. I contacted Skylink, nice folks, nobody talks outside the script. Since I no longer have the receipts the will not help other than to confirm the operating range of the receiver. I no longer have the invoices which I need for proof of purchase for warranty. Lesson here--keep your invoices. Second lesson don't buy these they aren't reliable.