Magic box and spirit bell For Sale

Themagician shows a empty box and a desk bell. Everything seems to be normal. Take a bicycle playing cards, and "force" one card to the spectator. Ask him to sign it. Shuffle it and place on the table. Ask the spectator himself to put one by one the cards inside the box. Suddenly when he places one of the cards, the bell rings!!! What was the card? Yes, exactly his magic card.You receive the box, the Spirit Bell (including it's remote control, so that you can use the spirit bell for other tricks), and one sample of the gimmick card. And instructions on how to prepare everything. You use your own bicycle playing cards.