Paws & Pals BazooK-9 Tennis Ball Launcher Gun with 2 Squeaky Balls COMPATIBLE: Works with standard tennis balls. Includes two (2) squeaky tennis balls ADJUST TO YOUR LIKING: Adjustable travel distance helps you determine how far you want to shoot your tennis ball GET MORE DONE WITH YOUR PET: Extra storage for more balls, so you can shoot multiple balls for your pet to fetch in one setting. Lightweight and durable with hands-free pickup. INCLUDES: Shoulder strap for comfort OUTDOOR FUN: The ball launcher is intended for outdoor use. Its the perfect toy for hours of playtime and exercise in your backyard or at the park and beach.