Elementary school ruler calculator, small, fresh, personalized, creative, adorable, multifunctional, with computer ruler for easy carrying

This lightweight and compact body is easy to carry and can be easily placed in a pocket or bag. Its buttons are made of high-quality plastic material. Not only is it comfortable to touch, but it is also durable, ensuring that it can maintain a good operation feeling in the process of frequent use. Its unique external battery design makes it more convenient to replace the battery, without the need for complex tools and operations, ensuring that the device can run stably and continuously.