https://teamknox.com/en/tech/gadgets/labtools/20_dp100/index.html Package PC-Based Control Comparison with a Portable Battery Compact Package Generate various voltage patterns If we have this, do we even need the variable-output type? Features A power supply for experiments. It’s well-built, and despite its compact size, it provides stable voltage and current output, making it very convenient to use. I’ve actually found it very useful in various experiments. Because it’s compact, it takes up very little space on my desk. Hugo en-us