The SadoTech wireless doorbell is great. It is quick to set up and you can adjust the ringtone and volume fairly easily. This is the second one I have purchased. The first one I had for probably 8 years, and the only reason I got another one was because the doorbell had been exposed to the elements for all that time and finally fell and broke. Up until then it had worked perfectly. When I checked to see if these were still available, I was delighted to see they were and I did not hesitate to buy another one.
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