This is a kind of professional chess competition timer, 3 working modes design, multi-use, which can be satisfied with multiple rules of GO. Support step counting function, support countdown/countdown. Easy operation, quick selection and rule setting. Suitable for Chinese chess, international chess and GO. You can try. Features: Multi-use design with 3 working modes, which can be satisfied with multiple rules of GO. Support of step counting function, support for countdown/countdown. Easy operation, quick selection and setting of the rule and one button to start. With memory function, it can be used repeatedly after setting once. Equipped with sound alarm, you can open or close it according to your demands. < p> Suitable for Chinese chess, international chess and GO. Features: Name: Chess competition timer Model: YS- 902 Material: ABS Color: Black, Yellow (optional) Battery: 2 * AAA batteries (not included) Screen size: 103 * 23 mm / 4.06 * 0.91 inch Item size: 140 * 88 * 45 mm / 5.51 * 3.46 * 1.77 inches Item weight: 105g / 3.70oz Package size: 150 * 100 * 50mm / 5.91 * 3. 94 * 1.97 inches Package weight: 157 g / 5.54 ounces Packing list: 1 * Clock chess