Feature 11. Chess clock size: 14 x 8.8 x 4.5 cm (length x width x height), weight: 157 grams, composed of high-quality electronic components and environmentally friendly and durable ABS shell. 22. Digital display: powered by 2*AA batteries, digital highdefinition display, professional digital timer, with countdown function, up to 10 hours. 33. Very simple to use: During the game, the time parameters of both parties can be modified. It has the function of alarm at the end of the game, rewards for each step, and delay time rules for each step, which is reliable and accurate. 44. Alarm clock function: When the time runs out, this chess clock will sound an alarm, and different basic time and auxiliary parameters can be set on the left and right sides. The alarm clock can be switched on and off, with memory settings. 55. Multi-function: suitable for amateur chess, home entertainment, professional games, and almost all competitive two-person board games.Material: plasticSize: 14*8.8*4.5cm/5.5*3.5*1.8inPower supply: 2*AA batteries (included) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1*Chess clock2*AAbattery