My old transformer fulfilled the minimum requirements for the Ring Pro, but sometimes the doorbell would warn of low voltage. I chose this as a replacement. Installs very easily. It seems to be of high quality and there hasn't been a low voltage warning on the doorbell since I've been using it. I recommend it if you need a new toroidal bell transformer. Updated 9/9/19. Now this thing isn't providing the right tension for my ring. Now constant problems with low voltage. That's how it went for 3 months. Now I will try another brand. I can no longer recommend this product. Updated 09/10/19. I contacted the seller and he sent me a new one. For now I will upgrade it back to 3 stars and upgrade again if the new one works somewhat as expected. I appreciate the quick response regarding the transformer and their willingness to make things right. Hope the new one lasts a long time.
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