Review on AVANTEK CB-21 Mini Waterproof Wireless Doorbell With 1000+ Feet Range, 2 Unique Remote Tones, 52 Melodies, CD-Quality Sound, And LED Flash by Tony Buckley

This was easy to install and set up. However, the instructions do not clearly explain how to set different ring tones for different transmitters. I spent a few days trading email with the company before they finally provided clear instructions.Also, there is an issue with the volume control. It can be turned down, but when you change the tone the volume is reset to the higher level again. With the higher pitch of the electronic tone at a higher volume, it was too painful for my ears and I had to stop after the third tone. I was not able to get through them all to choose a favorite.