This is a kind of professional chess competition timer, 3 operation modes design, multi-use, which can satisfied with multiple rules of GO. Support step counting function, support count up / countdown. Easy operation, quickly to set the rule. Suitable for Chinese Chess, International Chess and GO. You can have a try. Features: Multi-use, 3 operation modes design, which can satisfied with multiple rules of GO. Support step counting function, support count up / countdown. Easy operation, quickly to set the rule and one button to starts. With memory function, it can be used repeatedly after setting once. Equipped with alarm sound, you can open or close it according to your demands. Suitable for Chinese Chess, International Chess and GO. Specifications: Name: Chess Competition Timer Model: YS-902 Material: ABS Color: black, yellow (optional) Battery: 2 * AA battery (not included) Screen size: 103 * 23mm / 4.06 * 0.91in Item size: 140 * 88 * 45mm / 5.51 * 3.46 * 1.77in Item weight: 105g / 3.70ounce Package size: 150 * 100 * 50mm / 5.91 * 3.94 * 1.97in Package weight: 157g / 5.54ounce Packing List: 1 * Chess Clock Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.