inkint Professional Digital Chess Clock Count Up Down Chess Timer with Alarm Function, Chess Game Timer with Bonus and Delay Can serve as Count-Up Chess Clock, Max. 10 hours. Light weight and portable, convenient for carrying. Presettable, also can serve as Count-Down Chess Timer, Max. 10 hours. Before switching count on and count down, the machine need to be restarted. Alarm Function: Digital chess clock with alarm function when the match is over. Also with Bonus & Delay setting. Each step reward, each step delay timing rules. The left and right sides can set different basic time and auxiliary parameters. During the game, can modify the timing parameters of the both sides. Shutdown and then boot (non-outage), it can keep the last rule parameters before the shutdown. Suitable for Chinese Chess, International Chess, I-go, home game and competitions.