We were really impressed with this Star Globe, it has 2 different filters (1 x Stars / 1 x ocean creatures) and a plain light as well. We discovered that you can unscrew the top and change the filter for different projections and vary the light colours with the push of a single button. Rotation is also very simple with the push of another button and the whole filter rotates (but not the lid) slowly and moves the projection on the wall / roof. Powering up the device was easy as well, I've tried using 4 x AAA batteries and also the supplied USB cable with a power brick I had lying around and both modes of powering work well. The product would be even better if it had an internal rechargeable battery, however it works well when plugged into mains power. This is a good quality product, value for money and the kids love it. Definitely recommend this product.