After reading the instructions that have been poorly translated, I found myself throwing them in the bin and just going for it. In all a rather confusing but very clever bit of kit. It recognises different kind of coins and allows a value and associated time to match the values I think a real instruction book or video needs to be made. Also I had to drill another hole to bolt it to the wall because they built a power unit in front of the left one. Genius….. once you get the hang of it, it works well.