Bidding box for home-played games. Use of bidding boxes has several advantages over oral bidding: it reduces noise in the room, prevents bidding being overheard at neighboring tables, allows easier review of the auction, and reduces the opportunity to pass unauthorized information to one's partner (intentionally or not) by the manner and intonation in which one makes one's bid. A bidding box is typically a plastic box with two slots, each containing a set of bidding cards. One slot contains 35 cards with symbols of bids (5 denominations—clubs (), diamonds (), hearts (), spades (), and notrump (NT)—in seven levels of bidding,
Bidding box boxes has several advantages over oral bidding: Each player selects a card from the bidding box at their turn to make a call, and places it in front of him. To make a bid, the entire remaining stack below and including the desired bid card should be pulled out, e.g. when bidding 1, the 1, and 1 cards are taken out at the same time in one bundle (unless they have already been used in that auction), but this bundle of cards is kept together so that the topmost one (the desired bid) covers the others. Pass, Double, and Redouble