Volleyball is a team sport that emphasizes collaboration and teamwork. They pass the ball from player to player as they try to outwit their opponents in matches that typically last about thirty minutes. Beach volleyball is played on a sand court with two partners standing back-to-back at either end of the court. Each player has a paddle called a "volleyball." The goal is to have your partner hit the ball into your hand so you can shoot it down into the net below. Indoor volleyball is similar to beach volleyball but instead of hitting the ball with your hands, you use a metal stick called a "bat" to strike it hard toward the opponent's net. Players on a volleyball team should have equal access to the ball during gameplay. If one member of the team has the ball, other members of the team cannot do anything else until the first player returns it. A player who is not involved in the action can still play a role in certain situations such as serving or setting traps. However, if that player goes off base, it could give the opposing team an advantage. Also, like other team sports, volleyball requires each player on the team to know his or her role.