Brand: Tianfu Stopwatch (Quartz Hand Chess Clock) Model: PQ9905 [Product Parameters] Product Size: 200*51*123mm Product with packaging Size: 220*130*55mm Outer Box Size: 47*28.5*46cm Product Net weight: Gross weight of 359g product: 481g per box gross weight :16.2kg per box quantity: 32 pieces per piece water resistance: Non-soaking Regular packaging: Color box packaging Instructions for use: attached certification: ISO9001:2008,CE,ROHS Battery: One 5#AA battery color Black - Chess game timing clock - The game clock adopts a pointer-type quartz electronic clock structure with a timing start button - The game timing operation is intuitive and convenient, and the timekeeping is accurate - 5# (one cell) cylindrical battery [Chess clock Introduction] 1. It is commonly used in training and competitions of Chinese chess, international chess, Go, etc. 2. The timing rules can be preset. You can also modify the Settings by yourself. 3. It can automatically calculate the number of moves made by the player and emit an automatic prompt sound. 4. It is equipped with a lock switch to prevent mistakes caused by accidentally touching the key. 5. It is easy to operate, beautiful and durable. Precautions: 1. This product uses 1 AA dry battery (DC1.5V). 2. Before use, check if the battery quality meets the requirements. If it is not going to be used for a long time, please remove the battery. 3. Contact with corrosive substances should be prevented. Exposure to direct sunlight, rain, drops and proximity to magnetic fields should be avoided