This chess clock with counting, count down, bonus, delay (), alarm on/off, move counts & setting memory. Not only this digital timer allows checking moves for both players, but allow to adjust the rest of time. Available for Chess, Chinese Chess, I-GO,and other type . Many tournament has used this clock for the competition.You can set up two different base time on both sides. Professional Digital Timer with Count up / Countdown Timer, Maximum up to 10 Hours. Bouns and Delay functions with Easy Setting, Light Weight, Setting Memoried. The Chess Timer, perfect chess game , easy to operate when play games with friends, family in bar, club, home. Power supply: 1 x AA battery(Without) size:13.8X8.8X4.5cm Material:plastic colour:wood grain color Package Contents: 1 x chess clock Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.