Construction point: High-quality materials: The chess clock is made of high-quality electronic components and ABS shell material, which is environmentally friendly and durable Light and portable: The timer is light in weight, small in size and easy to carry. Stylish, easy-to-read large screen, with modern LED technology with eye-catching colors Professional chess clock: This professional digital timer has a countdown/count-down timer, max up to 10 hours Easy to set: reward each move, delay rule for each move. Different basic time and extra parameters can be set on the left and right sides, and an alarm will be issued at the end of the game Widely used: suitable for Chinese chess, Go, chess, family and games Material: ABS Color: Black Version: English Battery model : 2 AAA batteries (not included) Net weight: 150g Gross weight: 190g Package weight: 210g Window: 10.32.3CM Product size: 148.84.5CM Packaging method: boxed Power switch: power / sound switch Function: lump sum system / plus other systems / countdown system / timing / step function Products include: 1timer, 1instruction