When you play cards using cheating device and there are more then two person to co-operate, you should use vibrator or speaker to know the result. How does it work?
First wear an earphone into the ear and the put the trasmitte into you pocket, the background supportor use spkeaker to say to you. You can hear the voice what the supportor says.
speaker : 1 pcs
transmitter : 1 pcs
battery : 1 pcs
This device is widely used for private poker party, party gamble, casino, poker match, magic show.