Know exactly which ESP card the spectator has placed in the envelope. No sleight of hand Everything can be examined No marked cards or envelope No magnets or electronics An incredible clairvoyance effect Comes complete with 1 special black plastic envelope, 5 transparent plastic Jumbo ESP cards and instruction sheet. Envelope Dimensions Approximately: 7.5\” x 5\”ESP Card Dimensions Approximately: 7\” x 4.5\”