Made of wooden casing and copper-zinc alloy movement, safe and environmentally friendly. This chess clock does not require batteries, is driven by a clockwork mechanism, and is easy to use, similar to the operation of a quartz clock. The clock adopts a mechanical structure with a timing start button. Timing operation is intuitive, convenient, and accurate, with a daily error of no more than 1 second. It is suitable for timing in various chess games. Suitable for personal family use, teaching use, and various types of chess games, such as chess, Chinese chess, and go. Maintenance: The chess clock should be protected from contact with corrosive materials, and avoid exposure to sunlight, rain, impact, and proximity to strong magnetic fields. Specification: Color: Wood color Material: Wood + plastic + metal Size: 15 x 5.5 x 9 cm Package Contents: 1 x Wooden Chess Timer Only the above package content is included; other products are not included. Note: Lighting and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allows an error of +/- 1-3 cm.