This digital clock is ideal for chess and other games that require countdown timing, bonus settings, and delay functions. It is lightweight and compact, making it easy to carry in most bags and convenient for club or tournament use. Large, responsive buttons provide a comfortable press experience. Durable, high-quality ABS plastic construction. Features bonus and delay modes. Portable and energy-efficient design. Functions: Basic: Set the base time. Bonus: Set the base time and additional bonus time. Delay: Set the base time with delay intervals. Positive time: Set the base time to 0 for continuous timing. Technical Specifications: Material: ABS Color: Black Screen Size: 103*23mm / 4.06*0.91 inch Product Dimensions: 140*88*45mm / 5.51*3.46*1.77 inch Product Weight: 105g / 3.70 oz Package Weight: 157g / 5.54 oz Package Includes: 1 * Chess Clock