I also have a problem with my switch purchased at inters, followed the instructions and no beeps.
Told by revo it may need a cycle of power when connected to a laptop so downloaded the software, plugged it in and cannot install driver to make it work
There appears to be no drivers online so spoke to revo who sent me a memory stick with software on it and that didn't have it on either
error is code 28 no driver available, windows cannot find one online either