Review on Pocket Radar Classic Model: Accurate Speed Radar for Industrial and Traffic Applications by Michael Glassburn

This is a great product. Incredibly portable compared to traditional "gun" style radars. It's very accurate if you use it properly. If you use the device directly behind the jug and measure when you trigger it, it is as accurate as any other product. It falls off quickly, both when moving at an angle away from the object and at a distance. If you're sitting in the stands and want to measure the kids' throwing speed, you'll spend a lot more on the Stalker.