[ Simple Setting ]This chess clock adopts simple operation settings to avoid wasting unnecessary time on settings. [Easy to carry chess accessories] The portable chess clock adopts a design, making it and portable. This chess clock can be used both in the tournament room and outdoors. Without using the chess clock, you only need to put it in your bag. [Volume adjustment and shutdown function]Chess Clock with volume adjustment, including sound/mute function. You can adjust the volume according to your environment or preferences. When not in use, you can turn off the chess clock to save power. [Multi functional Chess Clock]professional digital chess clock has five modes: Basic, Delay,Bonus, BYO-YOMI, and positive timing. The maximum timer duration is 10 hours and there are five timer modes to provide you with different gaming experiences. Therefore, it is not just a chess clock timer, it can support multiple 2-player games worldwide and is not limited to your gaming style. [portability of battery drive]The portable chess clock is a timer with an extremely long battery life, so you rarely need multiple batteries to that stop.