Royal Alpha 587Cash Management Register With Reg, Z, PRG Keys READ PLEASE

Unit has only been tested for powering on. No other functions have been tested. The 3 keys operate the cash register but they do not open the register. I messed around for a little bit but I couldn't figure out which buttons to press to operate it. I do not know if it works properly or not but purchaser should assume it has issues as I could not test it. It only comes with the register and the 3 keys. Buyer is purchasing it is as. Shipped with UPS Ground