Description: Made of durable wooden casing and alloy movement, safe, environmentally friendly and durable. This chess clock does not require batteries, is driven by a clockwork, and is easy to use, to the of The game clock adopts a mechanical structure with start button. the game timing is intuitive, convenient, accurate, and the daily error is not more than 1 second. it is suitable 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 materials, and avoid exposure to the sun, rain, falling and close to fields. Specification: Material: Wooden++Metal Size Chart: Size: 15...2cm/5.94x1.73x3.23in Package Includes: 1 Piece Retro Analog Chess Clock Timer Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement. count up down timer mechanical chess game accessories competition clock accurate portable wooden mechanical chess clock