Multi Function: This advanced chess clock features single or multi-period countdown, move and time restrictions, delay, and byo-yomi time functions. Ideal for chess, Go, Chinese chess, and other two-player games requiring timed play. Check and Adjust at Any Time: The LEAP chess timer allows flexible operation with the ability to check or modify time or moves during gameplay. Timing rules on both sides can be set independently based on requirements. Memory Function: When powered off and restarted, the chess clock retains the last used timing rule. Data save mode preserves settings after changes to one of the 38 programmable rules. Easy Setup and Operation: Comes with 38 preset timing configurations for quick use without complex setup. Alternatively, use custom mode to adjust parameters such as multi-period countdown, move limits, and time controls. Portable and Durable Design: This digital chess timer is made from durable ABS material. Compact size measures 6.49 x 3.74 x 2.44 inches, making it easy to carry in a bag for use anywhere. Never start your game without a reliable chess clock. Color: Black Material: ABS Battery: 1 x AAA (not included) Package Contents: 1 x Chess Clock Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement error allowed within +/- 1-3 cm.