This digital clock is suitable for chess and other games that require countdown, count up, bonus, and delay times. It is lightweight and compact, making it easy to carry in most bags and convenient for club or tournament events. Features: - Large flexible buttons with improved press response - Durable ABS plastic material - Supports bonus and delay modes - Portable and energy-saving 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