Chess Clock Advanced Digital Chess & Portable Game Timer for Portable Timer for Board Games and Delayed Countdown Function

- Preset Rules Printed On The Back: Easy to use 42 preset rules, ready-to-use;The default value can be changed and saved inside for repeated use. - Keep Parameters: Power back on after power off, you can keep the rules and parameters of the race before power off. - Large Seesaw Button: Feel good, quick response, convenient control, more suitable for fast chess. Battery Powered: DC 3V power supply (two No. 5 batteries are not included). - Function: There are 42 timing rules in 8 categories, including single/multiple countdown,reward, time limit, delay, seconds, and forward timing. - Settings: Timing parameters can be changed for each timing rule.(except positive timing)Different timing parameters can be set on the left and right sides.