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 tactile buttons provide a comfortable press experience. Durable high-quality ABS plastic construction. Features bonus and delay timing 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 base time to 0 for incremental time systems. Technical Data: 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 x Chess Clock