I bought it over 6 months ago and it works silently!

I put it outside on my balcony, the battery screen facing the sunny side. I hanged it on my balcony. I turned it on. That was almost a year ago. Today I went on the balcony at night and I Realised - it silently works :)

Well, once the screen fell over and got completely Call flooded by the rain, I wanted to pour the water out by turning it around and accidentally it hit the ground. Then it stopped working. But When I unscrewed the plastic it turned out That thesis were just the batteries did fell off Because of the fall :) When I put it back it worked again. Lesson learned - it's really waterproof) and do not throw it;)

Cool stuff :) and most importantly, it really works :)