The DGT 1001 features countdown and up-count and has two large buttons on the top left and right to operate the timer. The clock does not have any bonus or delay options. Basic timer for any two player game Just turn it on, choose the total time and start playing Single AA battery (included) and clear display, count down and count up Play Chess - Have Fun! E-Book goes on to fill the gap between knowing how the chess pieces move (the basic rules) and knowing what to do next.