After reading all the postings in this forum, we gave up on trying to get rid of the doorbell’s hum. Appears that this is a defect we just have to live with. Fortunately for our home, the actual chime box is located far from the main living areas… With that said we do enjoy our Greet Doorbell. The ability to monitor all the packages delivered during the holiday season was great. Even the UPS drivers appreciated the added security of video documentation of their deliveries…!