Delay seconds    Range(min-max)    Apply

Use this tool at an earlier level of setter training to increase the level of difficulty. For example, once mastering a task, the athlete calls out the number on the screen. A variation is for decision-making process; if odd -> set to outside, and even -> set to self. The trick is where to place the screen and what reference point you give to the athlete to transfer it to the live game. Follow the link for other home peripheral vision workout - Pencil Push-ups and Near-Far.