Made of durable wooden casing and copper-zinc alloy movement, safe, environmentally friendly and durable.This chess clock does not require batteries, is driven by a clockwork, and is easy to use, similar to the operation of a quartz clock.The game clock adopts a mechanical structure with a timing start button. the game timing operation is intuitive, convenient, accurate, and the daily error is not more than 1 second. it is suitable for timing clocks for various chess games.Suitable for personal family use, teaching use and various types of chess games, such as chess, chinese chess, go and other games.Maintenance: The chess clock should be prevented from contact with corrosive materials, and avoid exposure to the sun, rain, falling and close to strong magnetic fields.Specification:Colour:Wood colorMaterial:Wood+plastic+metalSize:15x5.5x9cmPackage Contents:1 * Wooden Chess TimerOnly the above package content, other products are not included.Note: Light 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.