Multi Function: This advanced chess clock features single or multi-period countdown, restricted moves or time, 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, enabling time or move adjustments during gameplay. Timing rules on both sides can be set with different parameters as needed. Memory Function: After turning the chess clock off and back on, it retains the last used timing rule. The data save mode preserves settings after changes to any of the 38 programmable rules. Easy Setup and Operation: The chess clock includes 38 preset timing configurations for quick use without complex setup. Alternatively, use custom mode to adjust parameters such as multi-period countdown and move restrictions. Portable and Durable Design: This digital chess timer is made from durable ABS material. With compact dimensions of 6.49 x 3.74 x 2.44 inches, it easily fits in a bag for convenient transport. 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 allowance is +/- 1-3 cm.