I just popped this riight out of the box, peeled off the protective plastic and put it in some water. I walked outside into the sun, and it just started right up. It it isn't in direct sun, it will pulse slowly, but as soon as it gets into full sun, it runs at full speed. It has suction cups that would hold it into place if you were using it in a cute flower arrangement in a shallow bowl. I feed the birds all winter and spring, and this is going to be a big hit with my feathered friends.