Battery Included: No Hign-concerned Chemical: None : Countdown Model Number: Chess Clock Type: Mini Professional Board Game Stopwatch Count Up Down Competition Hour Meter Portable Table Games for International ChessProfessional Chess Clocks Digital Chessboard Competition Count Up Down Chess Games Stopwatch Timer Feature: Available for Chinese Chess, International Chess and I-GO. It is a presettable count up / countdown timer. With alarm when the match is over, you can open or close the alarm. You can set up two different base time on both sides. It store the last setting when it power on.Specification: Material: ABS Color: Black, Yellow Size: 14 cm x 8.8 cm x 4.5 cm /5.51x 3.46 x 1.77" Battery: 2 x AAA batteries (not included)Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3cm measuring deviation due to manual measurement. Packages: Specification: Package Contents: 1 x Chess Clock 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.