3 in 1 Mini Pocket Basic Calculator Ruler

The ruler can save your time and improve work efficiency, convenient, practical, stylish, durable and cute.It is very small, cute and easy to carry. The fully transparent display makes it tasteful and very interesting.Since it is powered by solar energy, you can use this calculator, which is not only completely economical but also very convenient.And it also has a magnifying glass.It is a necessity for students.