LEAP PQ9907S Chess Clock International Chess Go Clock(Wine Red)1. With 4 timing rules such as positive timing, countdown timing, bonus per step, delay per step 2. Different basic time and auxiliary parameters can be set on the left and right side 3. The timing parameters of both sides can be modified during the race 4. Power on again after shutdown (non power off), keep the rule parameters used before shutdown 5. Can be set to mute or alarm tips 6. Power supply: 1 AA battery power supply (not included) 7. Size: