1、Suitable for training and competition of Chinese chess, chess, go. 2、The timer function supports user setting, you can set the interval according to your need. 3、Can count the movements and make a reminding sound. 4、With a safety lock switch, which can prevent mistake caused by the wrong operation. 5、Portable and lightweight, easy to carry and store. Features: Suitable for training and competition of Chinese chess, chess, go. The timer function supports user setting, you can set the interval according to your need. Can count the movements and make a reminding sound. With a safety lock switch, which can prevent mistake caused by the wrong operation. Portable and lightweight, easy to carry and store. Specification: Material: ABS Color: as picture shown Battery: 2pcs*R20 battery (not included) Size: Approx. 196 * 118 * 87mm / 7.7 * 4.6 * 3.4in Weight: Approx. 509g Package List: 1 x Chess Clock