iFetch Frenzy Interactive Fetching Pet Toy there are no wires, no batteries and no electricity required. It's simple fetching fun for your dog and an arm rest for you. If you've got a small to medium-sized dog and live in an apartment or have a small backyard then the iFetch's small balls (much smaller than regular tennis balls) and short roll distance will be perfect for your dog. It's super simple: 1. Dog (or human friend) places ball in the hole at the top of the iFetch, 2. Gravity pulls ball down into one of three ball exits, 3. Ball roles out and away from iFetch, 4. Dog chases ball, 5. Dog retrieves ball and 6. Repeat.