Marked Cards Voice Amplifier

In the poker games, you need not only poker analyzers and one to one marked playing cards but also marked cards receiver devices. Special necklace one to one marked cards voice amplifier is one part of gamble cards accessories. The necklace of voice amplifier plays an important role in receiving poker results especially when the sound of earpiece is not loud enough.
With this one to one special invisible ink marked playing cards voice amplifier, no matter where the poker analyzer is, the mini wireless earpiece can work well for you. What is more, no poker players will focus on it when taking it with you and hide it well. Do you believe this small voice amplifier with such magic strength?