Features:1. Professional mechanical analog Chess Clock.2. Available for Chinese Chess International Chess and for I-GO.3. The clock adopts a mechanical structure with a timing start button. Easy Operation.4. No Battery Needed Wind-up mechanism ensures that you'll never have to interrupt a game to replace a battery. The timing is accurate and the daily error is no more than 1 second.5. It is suitable for all kinds of chess game timing clocks.6. Easy to Use: Just wind it up and set the hands before the game begins. Durable plastic casing lightweight and portable.Notice:1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement.Specification:Material: plastic case copper-zinc alloy movementProduct size: 15x5.5x9cmincludes:1 x Mechanical Chess Clocks