I purchased a 30 key KRS "dedicated" USB keypad configured for a CAMaster Stinger III X3. It came last week and the computer wouldn't recognize it. The keys worked but not as control keys. I tried several things and watched the video several times with no success. I had reached out to Joey and fully figured it was my error that was the issue. He said it might not have the correct firmware and he would send out another keypad. It arrived today and as soon as I unboxed it I knew it was different. There was a sticker on the back identifying the firmware and configuration. I plugged it in and it was plug and play!!! Everything worked like it needed too. If you are in the market for a keypad try US Router as this keypad can be used for other machines besides CAMaster. Buy with confidence from them.