Review on Wireless Doorbell - PHYSEN Waterproof Doorbell Chime Kits With 1 Transmitter+1 Receiver, Operating At 1300-Ft Range 58 Ringtones 5 Volume Levels & LED Flash, Door Bell For Home/Classroom by Marcus Rash

We have been using these for a few months now, We use them for medical purposes, home care for an elderly family member, to alert us if assistance is needed.Pros. The devices works very well, with a good range. Easy setup. Long battery life.Cons. It has many tones, but ours constantly reverts to default. That's ok, as the default is a traditional ring, but I would like to change it to one of the available tones. When changed, it reverts to default the first time it is used.But overall, it serves it's purpose, at a very reasonable price. I would recommend.