Feature: 1. Portable Chess Clock: Versatile clock is easy to carry and suitable for various occasions. Clear and easy to read digital display screen ensures the accuracy of the game process. 2. Positive Time: The longest positive time is 9 hours, 59 minutes and 59 seconds. Countdown timer: customisable time setting, the maximum time can be set to 9 hours 59 minutes 59 seconds. Reward function: You can customise the time for each reward step, the maximum time for each reward step can be set to 59 seconds. 3. Delay Function: You can set the delay time for each step, the maximum delay time for each step can be set to 59 seconds. Alarm Function: When one side loses, it will emit an alarm sound which lasts for 3 seconds. Memory function: After switching off and switching on again (not power failure), the last used rule parameter before switching off will be kept. 4. Indicator Light: When the key is cocked (the light is on), one side will start the timer, and the arrows on the display will point to the side of the game. Battery capacity indication: when the battery is almost exhausted, there will be an indication symbol in the top centre of the display. Step counting function: can be viewed and modified (generally used in regular chess tournaments). 5. Customizable Settings: Simple operation allows users to set time and delay functions according to game rules. Battery capacity prompt indicates when battery is running low. 6. ABS Material: Constructed with ABS material, ensuring long term reliability and durability. Professional design for chess and board game enthusiasts.Multifunctional Timer: Perfect for chess and board game competitions. 7. Versatile Usage: Digital chess clock is suitable for a variety of chess games, including international chess, Chinese chess, and Go. Ideal for players, families, and chess training institutions and so on. Specification: Item Type: Chess Clock Material: ABS Product Size: Approx. 13.8 x 8.8 x 4.5cm / 5.4 x 3.5 x 1.8in Battery: 1pc 1.5v AA battery (not included). Package List: 1 x Chess Clock1 x Manual