Come to a game The practical quartz analog chess clock can be used for Chinese chess, chess and I-GO. A perfect playing gift for chess lovers. clock adopts a mechanical structure with a timing start button.The timing is accurate, and the daily error is no more than 1 second. Easy Operation.Press the left button, left timer stop timing and right timer begin timing, . The housing is uniquely molded to allow the clock to at a slight angle for better, non- viewing. Chess Clock is a good helper to interact with relatives, friends and elders at birthday parties, Christmas holidays, and parties. SIZE: 18 x 6.5 x 11.5cm 1 x AAA battery not included Color: black Material: ABS Package Contents: 1 x Chess Clock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.