Magic Tricks

I purchased this device to possibly use with a Dollar Bill, reveal the serial number effect as I thought it might help me do a clean switch. The device could be used for that but it would be very difucult to modify the device. They claim that you can use other things than a card but you would have to take the whole thing apart and rebuild it. Also, even the effect with the card I'm sure looks great but is very noisy and they don't give any suggestions as to how to overcome the massive noise this clip makes. I will likely never use this device.