Hi, Paul! I have this nice device (also called wmn-5090) and all i could do at a time is to read its firmware and disassemble it. To this moment only left-right-up-down commands are known more ore less exactly... i can't say it more exact because the work is not finished, besides all other commands like memory and power on - off are under research :) if you are interested in this i can mail you the results i have.