You've upgraded your RC car, but is it actually fast? Racing your buddy is fun, but it doesn't give you objective data. That's where the SkyRC GNSS comes in—a dead-simple GPS speed tracker that works anywhere in the world. It's tough, easy to mount, and pairs with your phone in seconds. The downside? You can't export the log files, which is frustrating for data nerds like me. But at under $70, it's still a solid tool for tracking your progress. If you want to know whether your brushed motor can really hit 40 mph, this little black box will give you the answer.