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. Check and Adjust at Any Time: The LEAP chess timer allows flexible use, enabling time or move checks and modifications 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 preset rules. Easy to Set and Operate: Equipped with 38 preset timing modes, this chess clock offers quick setup without complex configurations. Alternatively, use custom mode to adjust parameters such as multi-period countdown and move restrictions. Portable and Durable: This digital chess timer is made from durable ABS material. With dimensions of 6.49 x 3.74 x 2.44 inches, it is compact enough to carry in a bag for convenient use anywhere. Color: Black Material: ABS Power: 1 x AAA battery (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 tolerances are within +/- 1-3 cm.