Mechanical Structure: The mechanical structure with timing start button is adopted to make timing compatible withoperation intuitive, convenient and accurate. Chess Game: No need batteries. It's driven by spring. It's easy to use, similar to the working mode of quartz clock. High Precision: The daily error is less than 1 second, which is suitable compatible withtiming clock in various chess matches. Wood Material: The clock is made of wood and plastic, strong and durable and not easy to break. Wood color design, exquisite workmanship. Special Maintenance: The chess clock should be kept away from corrosive substances and exposed to sunlight, rain, water drops and strong lodestone field. Specification: Color: As shown. Material: Plastic shell, copper zinc alloy movement. Size: Approx. 15x5.5x9cm/5.9x2.17x3.54inch. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Timer.