Description: Suitable for Chinese Chess, International Chess Game and Board Game Playing. Press the left button, left timer stop timing and right timer begin timing, vice versa. Press two buttons simultaneous to half, both timers are in stop state, insert the clip to make sure the stop state. Wind-up the hands before starting and push top buttons to track time during game. Made of durable ABS plastic casing, safe, environmentally friendly and durable. Specification: Material: Plastic Size(L x W x H): 15.5cm x 4cm x 8cm / 6.10in. x 1.57in. x 3.15in. Color: Black Package Includes: 1 Piece Chess Clock Note: No need battery, the product is wind-up chess clock. Due to manual measurement, there may be 1-2mm error in size. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.