Intex has been making the world’s best traditional games since 1963. Each game is crafted with high quality sustainable materials with attention to fine details. The Analog Chess Timer is cherished in the chess community for its reliability, high accuracy design, and durable construction. Batteries are included and the clock is easily turned on with a switch on the back. It is simple to use, just push the buttons on top to start and stop the clocks. A Quartz clock uses an electronic oscillator that is regulated by a quartz crystal to keep time. This enhancement allows the clock to be at least an order of magnitude more accurate than other mechanical clocks! Whether you are traveling to tournaments or participating in a chess club, this is a great tool to improve your play and become an all-around better player.For Ages:15+WARNING: Choking Hazard; Small Parts. Not for children under 3 years old.