This digital clock is suitable for chess and other games that require countdown, count up, bonus, and delay timing functions. It is lightweight and compact, making it easy to carry in most bags and ideal for use at club or tournament events. Features: - Large, responsive buttons for improved tactile feedback - Durable ABS plastic construction - Supports bonus and delay timing modes - Portable and energy-efficient design Functions: - Basic: Set basic time - Bonus: Set basic time and bonus time - Delay: Set basic time, second reading times, and delay time - Positive Timing: Set basic time to 0 for overall rationing system Specifications: - Material: ABS - Color: Black / Yellow (Optional) - Battery: 2 * AAA battery (Not included) - Screen size: 103 * 23mm / 4.06 * 0.91in - Item size: 140 * 88 * 45mm / 5.51 * 3.46 * 1.77in - Item weight: 105g / 3.70 ounce - Package size: 150 * 100 * 50mm / 5.91 * 3.94 * 1.97in - Package weight: 157g / 5.54 ounce Packing List: 1 * Chess Clock