Features: Large and flexible buttons for better pressure feeling. High quality ABS plastic case. Available in rewarded and delayed mode. Portable and energy-saving design. Features: Basic: Sets the base time. Reward: Set the minimum time and the reward time. Delay: Set the base time, seconds reading time and clock time. Operating time: Set the base time of the entire distribution system to 0 Specifications: Material: ABS Color: Black Batteries: 2 x AAA batteries (included) Screen size: 103 x 23mm Product size: 140*88*45mm/5, 51 * 3.46 * 1.77 inch Commodity weight: 105g Packing size: 150 x 100 x 50mm Package weight: 157 grams Packing note: 1 * chess clock Note: 1. Please allow a little error due to manual measurement . Please make sure you don't mind before you bid. 2. Color may vary due to different monitors, please understand. Note: Hello, please pay attention to your shipping address when purchasing products. If your receiving information (e.g. name, street, house number, doorbell/email address without a name, etc.) is incorrect, the order will not be delivered correctly.