Description:Suitable for Chinese chess, international chess and board game. Press the left button, the left timer stop timing and the right timer start timing, vice. Press two buttons halfway at the same time, both timers are in the stop state, insert the clip to make sure the stop state. Curl your hands before starting and press the top buttons to track time while playing. Made of durable ABS plastic housing, 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: BlackPackage Included:1 Piece Chess ClockNote:No need battery, the product is a wind-up chess clock. Due to manual measurements, there may be an error of 1-2mm. Due to the difference between different monitors, the picture may not reflect the actual color of the item.