Marc Oberon - Digital Deception

Digital Deception by Marc Oberon
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