Review (1/5): BE CAREFUL
1-This is not a safe dog toy as it is hard plastic (choking hazard) and it has a battery (toxic!)
2-The 'washable' cover on the toy is also dangerous as the zipper piece broke off and left a very sharp pin on the fabric. This happened twice when I washed them.
If you do decide to play with your dog with this toy don't leave them unattended and throw out those fabric covers. Sad these are sold as pet toys. BE CAREFUL