feature: *This digital clock is perfect for chess and other games that require countdowns, positive numbers, bonuses, and delay times. It's lightweight and small, so it fits easily into most bags and can be taken with you to and from club or tournament events. *The large buttons are flexible and feel better when pressed. *Bonus and delayed modes available. Portable and energy-saving design. Function: Basic time: Set the basic time. Rewards: Set base time and bonus time. Delay: Set base time, read seconds and time. Positive timing: Set the base time of the entire dispensing to 0 Specification: Material: ABS Color: black/orange (optional) Batteries: 2 AAA batteries (not included) Screen size: 103*23mm/4.06*0.91 inches Product size: 140*88*45mm/5.51*3.46*1.77 inches Product weight: 105 g/3.70 oz packing list: 1* chess clock 【Utility and value】If a product is useful to you, it has value when we sell it. 【 Shopping cart 】 Buy multiple pieces at a time, the more affordable the price. 【 Good quality】Made of high-quality material, ensuring durability and practicality in usage. 【 After-sales service 】 Provide 48-hour after-sales service to quickly answer your questions.