Made of high quality ABS material,durable,eco-friendly,simple operation. Countdown function, multi-stage countdown, positive timing function, delay function for each step, plus second function, non-equivalent parameters can be set, time limit function, display of chess moves, countdown function, mute,low noize. With single/multi-stage countdown, bonus, time limit, delay, countdown, positive timing, timing parameters can be modified for each timing rule (except for positive timing). Different timing parameters can be set on the left and right sides. During the game, the timing of both sides can be modified. Timing parameters, power off and on again, can keep the rules of the game before the power off. 2pcs AA battery powered(package not include). Multifunctional,it is often used in Chinese chess international chess, Weiqi and other training and competitions 2 players games. Specification: Material:ABS Size:Approx.16.1x10x6.2cm/6.34x3.94x2.44inch Package Includes: 1 Piece Chess Clock(2 Pack) Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.