The magician set his watch to a certain time, the spectator chooses any time of the day, in hours and minutes, and the time set by the magician matches with the one named by the spectator!

Manufacturer Says

Watch May Be On The Table At All Times Magician Never Comes Near The Watch May Be Performed With the Watch On Your Wrist The Entire Time No Magnets You May Wear It As Your Normal Watch Includes Watch, Case and Instructions