RERBIO’s automatic ball launcher solves a simple problem: your arm gets tired long before your dog does. This is a compact, 10.2-inch cube that holds three standard tennis balls and fires them at one of three distances: 19, 33, or 49 feet. It’s built for small to medium dogs who need more than a lazy toss across the living room.

The launcher uses a manual loading system. You drop a ball into the top chute, and it fires with a satisfying thwip. The three distance settings give you real control. Short throws keep play close for a smaller yard or indoor sessions. The long setting sends the ball nearly 50 feet, which is enough to exhaust a high-energy terrier or spaniel in about 15 minutes. The launcher runs on six D batteries (not included), so you can take it to the park without hunting for an outlet.

There is a catch. The launcher only holds three balls at a time, and you have to reload each one manually. It’s not a hands-free experience. You still need to be present to pick up returned balls and feed them back in. That’s fine for a structured training session or a quick energy burn. But if you want a fully autonomous fetch machine, this isn’t it. For what it is—a reliable, adjustable thrower that saves your shoulder—it works well.