Features: 1. Professional mechanical analog chess clock. 2. Suitable for Chinese chess, international chess, and go (I-GO). 3. Features a mechanical structure with a timing start button for easy operation. 4. No battery required; wind-up mechanism ensures uninterrupted gameplay. Timing is accurate with a daily error of no more than 1 second. 5. Ideal for various types of chess games requiring timing. 6. Easy to use: Simply wind up and set the hands before starting the game. Durable plastic casing, lightweight and portable. Notice: Actual color may vary slightly from the image due to differences in monitor displays and lighting. Allow 1–3 cm variation due to manual measurement. Specification: Material: Plastic case, copper-zinc alloy movement Product size: 15 x 5.5 x 9 cm Includes: 1 x Mechanical chess clock