Multipurpose design The 3-in-1 chess clock offers multiple timing modes including basic, rewards, delay, and positive timing to fit different chess game scenarios and time controls. User-friendly interface Large buttons provide a responsive, easy-to-press feel for precise operation during fast-paced play. Sturdy and portable Constructed from ABS plastic for durability, with a compact, portable design that is convenient for chess tournaments and practice sessions. Energy-efficient Equipped with an energy-saving mechanism to extend battery life and minimize replacements; operates on 2 AAA batteries. Use scenarios - In chess tournaments for reliable, flexible timing across standard and varied formats. - In practice sessions to switch between timing modes and train in different time controls. - In chess clubs or training groups for group play and instructional setups that require straightforward operation.