The description states that the sound turns off at night, but as there is no light sensor the sound goes off even in the dark. It is also the same sound each hour. Upon arrival, the clock needed calibrated, as the minute and hour hands did not line up at 12 noon. But for $10 I guess you can't expect too much!
Clock keeps time fine, but I had to shut the sound off, as the whinnies disrupt you in the middle of the night...every hour. If it had a light sensor that prevented it from going off in the dark this would be a 5 star product. The illustrations on the clock are beautiful and the wood finish makes it suitable for almost any room/ environment.