Specifications: Product name:Chess Clock;  Color:Black;  Material:Plastic;  Size:19cm/7.48"×13cm/5.12"×3.5cm/1.38";  Battery:Powered by 2 × AA battery;    Features: Available for Chinese Chess, International Chess and I-GO;  Press the time key, the opponent starts timing;  A total of 8 types of timing rules;  Each rule can set the basic time and auxiliary parameters respectively according to the DIP switch at the bottom (the two sides can set different basic times);  Can be set to ring or mute, ringing lasts for 10 seconds (no sound in silent mode);  When the game ends or the game is paused, you can press and hold the reset button for 3 seconds to quickly reset;  Rules can set time (time and number can be calculated separately or in combination);  1. Basic time: 3 5 10 20 40 80 (minutes);  2. Extra time for each step: 1 2 3 5 10 20 (seconds);  3. Time limit for each step: 3 5 10 20 40 80 (seconds);  4. Countdown: 1 2 3 5 10 20 (times);  5. Countdown time: 1 2 5 10 20 40 (seconds);    Package Included: 1 x Chess Clock;