SKYRCGNSS Performance Analyzer RC GPS+GLONASS Speedometer, Bluetooth Enabled Race Data Logger and Speed Tracker for RC Cars and Planes. GSM020 SK-500023

I recently purchased a Traxxas Maxx V2 (Widemaxx) and liked the onboard telemetry that it already had. I bought the bluetooth module for the transmitter, and explored and used the Traxxas Link app enough to get familiar with it and noticed that it used rpm, tire size, and gear ratio to determine the speed of the vehicle. I figured that it would get a good estimate on vehicle speed by using math and such, but I felt that it would only be in the ballpark and wanted something more accurate and definite like a gps unit would. I was going to buy the telemetry expander kit and Traxxas's gps module, but it was a little out of my price range, even though I felt it would be nice to have everything in one app.However, every time a watched a YT video of someone doing a speed run, they had this SkyRC module and I wanted to know why they were using this instead of the Traxxas unit. Price is my guess, as this is more affordable and it is also universal to anything you want to strap it to.In my limited use of this device, I will say that it is a great unit. It's small (there are no actual buttons on it, it powers on when you open the app) and the app is very simple and straightforward to use. I currently have it velcro'd and ziptied to the front shock tower brace (just above and forward of the steering servo and bellcrank on my maxx) and crashed and tumbled and it's been just fine. No issues with durability whatsoever. The battery life is fine in my opinion (I have used it about 4 or 5 times on some 10-15 minute speed run/bashing sessions and it's still at 80% battery life), and I mounted it in such a way that the usb port is accessible without me having to cut the zipties and remove it from the truck. As far as accuracy is concerned, I feel that it's about as good as it's going to get (what's better than gps in this instance? ). I typically see it linked to around 12 or so satellites, and I live in a moderately wooded sub/rural area and it connects to them within about 30 or so seconds.Great buy, No complaints with the unit or the app

Very Easy to Use, Good Battery Life, lightweight, and Great Performance. A+

So I love this gps, I use it in my Rc cars with a bracket I printed from thingiverse, and I can use it in my bicycle as well. Only two complaints, it only shows speed in whole numbers, no decimal accuracy, and to be absolutely honest it should be moulded out of blaze orange plastic to make it easier to see if it falls off I wrapped mine in some reflective tape I recommend you do as well especially if you use it in the outside of your car.

Works great, gotta give it a few minutes to link up to satellites for it to work.

I found this to be very accurate and easy to set up and use.

Worth getting so you know how fast that rc is going. It’s easy to use too

It works well enough, but the app kind of sucks. There is no power button, and the unit doesn't always turn off when you power it down via the app. Next time you go to use it, the batteries are dead.The app could be a little bit better. The app will occasionally freeze, and the only way to get it to work again is to go into app settings and force stop it, and then restart your phone. Sometimes you have to reset the gps unit itself. A sim card tool or safety pin works best, but there is no tool included with the unit.

Working wonderfully. No problems at all checking the speed on my RC Truck. Fast and simple to use. Turns on and off with the app with no problem.