I live in the UK and I found one of these record player kits in a charity shop. I enjoyed building mine and I can play record either by winding the handle on the side or via a USB power source. On my record player I found using the 45RPM speed wheel produces the best results with the supplied record.
Someone must have put a motor in it. To operate that. They don't come with motors. The building kit is not worth it. It's got a horrible Amp system that you power off a USB. The pickup is very poor quality. Don't play your best vinyls or records on it. It destroys valuable records. It's a good ornament for a desktop display. The price of this kit is not worth it.