Professional Digital Timer with Count up / Countdown Time Available for Chinese Chess, International Chess,I-GO and Other 2 Players Board Game Chess clock timer is made of electronic components & ABS shell, environmentally friendly and durable. Requires 2 AA batteries(Not included) Material: ABS colour: as shown Package Contents: 6 x Chess Clock timer(without battery) Only the above package content, other products are not included. Note: Light reflection 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.