Made of durable plastic casing and copper-zinc alloy movement, safe, environmentally friendly and durable. Transparent casing with a retro design for a stylish look. This chess clock does not require batteries and is powered by a mechanical movement, offering easy operation similar to a quartz clock. The game clock features a mechanical structure with a timing start button, providing intuitive, convenient, and accurate timing with a daily error of no more than 1 second. Suitable for various chess games including chess, Chinese chess, and go. Ideal for personal, family, educational, and general game use. Material: Plastic + Alloy. Maintenance: Avoid contact with corrosive materials, exposure to sunlight, rain, impacts, and strong magnetic fields. Size: 15.5 x 5.5 x 9.5 cm / 6.1 x 2.17 x 3.74 inches. Package includes: 1 piece retro analog chess clock timer. Note: Color may vary slightly due to monitor color calibration. Slight measurement deviations may occur due to manual measurement.