Ifetch too large interactive ball thrower for dogs- launches standard tenni we usually respond within 24 hours on weekdays. Interactive, on demand ball launcher that lets dogs play fetch to their hearts' content This is the large version that launches full size tennis balls Runs on a built-in, rechargeable battery Comes with three 3 non-abrasive, pet-safe tennis balls Strengthens the bond between dogs and their humans and brings a fun new twist to the familiar game of fetch.