Used only once for the First-Class Architect's drafting exam. Description excerpt: Color: 2_White Brand: Dretec Material: Plastic Product Dimensions: 7.9 depth x 5.7 width x 2.4 height cm Product Weight: 0.05 kilograms Number of settings: 1 【Convenient Timer Function】A timer with a "countdown" function, convenient for time management. You can start/stop by pressing the button on the top, making it ideal for measuring study time for drills or time trials for games. 【Notification with Light and Alarm】It notifies you with an alarm and light when the set time is reached, allowing you to concentrate on your studies. You can set it to "silent" if you don't want to make a sound, such as in a library, study room, or late-night study sessions. Okay to use in quiet places! 【Push Button Type】The start and stop buttons are push-button design. It feels like a game, which should help you study more efficiently and increase your motivation! 【3 Easy-to-Use Points】① The screen is angled, making it easy to see even when placed on a surface. ② Equipped with a key lock function to prevent accidental operation, providing peace of mind. ③ Uses 2 AAA batteries. Batteries for operation check are included, so you can use it immediately after it arrives at your home. 【Product Details】Size: Approximately width 57 x depth 79 x height 23mm, Display method: LCD digital 7 digits, Maximum set time: 199 hours 59 minutes 59 seconds, Thank you for viewing.