If you have this electronic counterfeit bill detector, I'm not certain I want to know what type of business you're in. According to a source, Japanese tourists often fall prey to unintentionally accepting counterfeit bills.

This little device, no bigger than a Keychain, uses both UV ray detectors as well as scanning for the magnetic code that is on real bills. By scanning the coding on the bill, a legitimate reading will register as a loud (or as loud as this little device can get) beep.

So now you don't have to worry if your bills are real. Then again, I would have to admit that I never really did in the first place. By the way, this machine is only available in Japan.

Via TOKYOMANGO