Feature:1. VERSATILE USAGE: This chess clock is ideal for various board game competitions, such as Chinese Chess, International Chess, and Go, catering to a wide range of timing needs in competitive play2. CUSTOMIZABLE TIMING RULES: Easily set basic time and auxiliary parameters for each timing rule, allowing for flexible game management and accommodating diverse player preferences3. INDEPENDENT SETTINGS: The clock lets you set different basic times and auxiliary parameters for each side, providing tailored timing options for both players during matches4. ADJUSTABLE IN GAME: Modify basic time and auxiliary parameters for both players during the game, offering dynamic control over your match timing without interruptions5. MEMORY FUNCTION: After shutdown, the chess clock retains the rule parameters, ensuring you can resume play with your saved settings for convenience and ease of useSpecification:Item Type: Chess ClockMaterial: ABSBattery Type: AA batteries x 2 (shipped without batteries).Package List:1 x Chess Clock1 x Instruction Manual