Because Klangtop operates through various independent LLCs and white-label distributors, they do not host a centralized website. To track down a physical PDF copy of the user manual:
Press and hold the Play/Pause button for 3 seconds.
If your PC or Mac fails to see the player when plugged in, the issue is usually the cable. Many Micro-USB cables are "power-only" and do not transfer data. Ensure you are using the original cable provided with the player or a verified high-quality data cable. Bluetooth Won't Connect