1It'S A Presettable Count-Up Timer, Maximum Up To 10 Hours, Light Weight And Portable, Convenient For Your Carrying,We Will Give You A Protect Package For Free To Help You Protected Your Chess Clock2During 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, Before Switching Count On And Count Down, The Machine Need To Be Restarted;3Each Step Reward, Each Step Delay Timing Rules. The Left And Right Sides Can Set Different Basic Time And Auxiliary Parameters, With Alarm When The Match Is Over;4Made Of Durable Abs Plastic Casing, Safe, Environmentally Friendly And Durable;5Suitable For Chinese Chess, International Chess , Home And Competitions;