Nice thing! Not for chewing
It's a fun gadget. It's a bit annoying that it turns off after a certain number of seconds when it's not moving, because if your dog can't find it, you want to be able to find it yourself.
The ball is made of solid rubber with a hole in it, where the orange 'lid' is screwed on. You can unscrew this to charge it and to turn it on/off. In the middle of the ball is a light with a motion sensor.
Don't leave your dog alone with this ball, the lid breaks easily.