디지털 속임수

You remove a key and ring from your pocket and explain that your audience will create a three digit number. You ask several people to name a single digit number and these are put together to create a random three digit number.
Amazingly, the number named exactly matches the number digitally printed on the key ring!Includes: Instructional DVD, notepad, permanent marker, key and tag gimmick, and detailed instruction booklet.