Feature: The large buttons are flexible and have a better pressing feel. High quality ABS plastic material housing. Available in bonus and delayed modes. Portable and energy-saving design. Basic: Set the basic time. Rewards: Set base time and bonus time. Delay: Set the basic time, number of seconds to read and time. Positive timing: Set the basic time of the entire distribution to 0 Specification: Product Name: Chess Clock Material: ABS Color: black/yellow (optional) Batteries: 2 AAA batteries Screen size: 103*23mm/4.06*0.91 inches Size: 140*88*45mm/5.51*3.46*1.77 inches Item weight: 105 g/3.70 oz Packing size: 150*100*50mm/5.91*3.94*1.97in Packaging weight: 157 g / 5.54 oz Package Content： Chess Clock*1 Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. The large buttons are flexible and have a better pressing feel. High quality ABS plastic material housing. Available in bonus and delayed modes. Portable and energy-saving design. Basic: Set the basic time.