You get two different devices. The one to float a wallet broke immediately. I can fix it.
This a trick that looks much better on camera where the device cannot bee seen. Close-up it is
angle sensitive.
I like it, but I am afraid the gimmick can be seen too easily.
I hope i can be honest with your problems, first of all people you are proforming for have no idea what you are doing or are going to do, so they have no idea what to look for or expect, so do the magic and dont worry about what they might see, sincerely joseph guzman.