I got two one for the front door and the back door.
I noticed immediately how restricted I was to a power source. I expected the volume to reach further than it did, so I found myself struggling to hear it.
I was quite disappointed because it said there was different volume options.
The melodies were the usual options. Which is fine by me, the quality is good also.
Would I recommend it? Yes, it's great for flats and smaloism garden homes. Is it ideal for me? No unfortunately. I won't be continuing to use it. It's a shame because it is a neat unit. Just not for my lifestyle, I'd miss the door.