Review on 🚗 VKmaker Smart Robot Car Chassis Kit with Speed Encoder, Ultrasonic Module, and Battery Box - New Avoidance Tracking Motor System 2WD. Includes Tutorial CD. by Young Rich

I bought 2 of these sets. Just can't beat them at cost. The instructions are useless. None of the kits I bought listed a battery box in the instructions, which skews the placement of the parts on the chassis. For good instructions and code, see the links in the questions section of the product description on Revain. It won't be a good beginner's kit - on the downside, it's tricky and fun to sort/search/learn your own way to make it work. I recently bought a Lafvin kit for just a few more dollars. Much better instructions and code works.