This is the CASIO MW-12GT, a high-performance mini-just type calculator. This high-function model is specifically designed for use in bookkeeping exams and accounting practice, combining portability and operability. 【Main Benefits of This Calculator】 High Performance for Bookkeeping and Practical Use: Time Calculation Function: Useful for calculating hours, minutes, and seconds. It can also be used for bookkeeping exams. Tax Calculation Function: Allows you to freely set and change the tax rate, convenient for daily accounting work and tax returns. Fast Input Function (2-key rollover): Allows for accurate and fast numerical input even in busy practical work. Excellent Operability and Portability: Mini-Just Type: Compact design with dimensions of 145mm depth x 103mm width, saving space on your desk or in your bag. Contoured Keys (Plastic Keys): Provides a solid key touch, reducing key operation errors. High Reliability: T・W・P (Solar and Battery Dual Power): Less worry about battery depletion, allowing for long-term use with peace of mind (battery life approximately 7 years). This is a reliable calculator that supports studying for certification exams and daily accounting work. I haven't used it much after purchasing it. Although it is used, I believe it will still be useful. Please check the condition in the photos before purchasing. Operation has been confirmed.