Feature 1、Larger display with more information. 2、Support countdown, count-up timer, bonus time, delay, limit time. 3、39 pre-setting timing system. Settings are memorized. 4、LED indicator light on during the timing. 5、DC 3V power supply, runs on 2 or 4 AA batteries (not included). 6、Can also work with wall charger or power bank via a USB cable. 7、Suitable for Chinese chess, International chess, GO chess, or other 2-player games. Features: Larger display with more information. Support countdown, count-up timer, bonus time, delay, limit time. 39 pre-setting timing system. Settings are memorized. LED indicator light on during the timing. DC 3V power supply, runs on 2 or 4 AA batteries (not included). Can also work with wall charger or power bank via a USB cable. Suitable for Chinese chess, International chess, GO chess, or other 2-player games. Specifications: Material: ABS Color: Black Size: 197 * 126 * 58mm / 7.7 * 5 * 2.3in Weight: 370g / 13oz Package List: 1 * Chess Clock Package List 1 * Chess Clock