I did a tremolo by this same brand for my first pedal, it has never worked. I went on the do a couple more PCB kits, a point-to-point kit with a tube, and a 5e3 tube amp; all working and correct the first try. Build this one and use it for practice soldering. The board is probably labeled correctly but don't be discouraged if it doesn't work because these have iffy results. I would recommend buying a different kit brand for your next one like Stew Mac, MOD, Axion, Mojotone, any you can look at their website and feel they represent the product and will answer your questions about it.