I bought this for my hearing impaired mother. She could not hear people at her door. The volume is loud when turned up, which was what we needed. There are 2 speakers that you can place anywhere in the house. They plug directly into an electrical outlet. You can choose from many different tones for the doorbell. I was very pleased with the way it worked. I would buy this again. It also is pleasing to the eye when you attach it outside your door.
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