Chess Clock Digital Timer, Professional International with Large Seesaw Button, Game Timer

【MULTI-FUNCTIONS】- 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.During the race, the timing parameters can be changed. 【LARGE SEESAW BUTTON】: Feel good, quick response, convenient control, more suitable for fast chess. 【SUPPORT GAMES】:Available for International Chess, Chinese Chess, I-GO,and other type board games. Many tournament has used this clock for the competition.You can set up two different base time on both sides 【BATTERY powerED】DC 3V power supply (two No. 5 batteries are not included)., Weight: 0.5732018812 pounds, Manufacturer: QOTSTEOS