Timer rules include BASIC, BOUNS, DELAY, BYOYOMI and COUNTUP, it automatically switches to positive time mode after countdown.Userdefined time can be set up to 95959, different timer parameters can be set for both sides, and the time can be changed during the game.It can automatically save the parameters set before shutdown.Step recording function you can view or change the number of steps taken up to 999 steps.Sound and mute function you can turn on the voice message or turn on the chess clock.Functions BASIC Means time mode in current timeDELAY Indicates the current delay mode at the current time.BONUS Means second increment mode in current timeBYOYOMI Means Goned countdown mode in current timeBattery 2AA battery not includedColor BlackMaterial ABSPackage contents1chronographOnly the above package contents, other products are not included.Note Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is13 cm.