This little fountain is very pretty and sounds terrific after adding little rocks and pebbles... otherwise, there is no sound at all.
Since the plastic container is completely waterproof, I have set it in the middle of my bird bath... looks and sounds great.
Only complaint is that when I called the customer service number on the instruction booklet, the customer service agent had no idea why the fountain didn’t make any noise, she said she had never heard of that problem (!)  and had absolutely no solution to offer. Didn’t even offer to send another pump or another fountain... nothing!
Fortunately, I read someone else's comment regarding pebbles, before returning the product.
Since the product is great, I will give it a 5 star rating