Ⅰ. The Calculator is for efficient and accurate calculations, for all your mathematical challengings. Ⅱ. Its user friendly design and comfortable typing experience, and practical tool for various users. Ⅲ. Lightweight calculator fits in your pocket and comes equipped with basic arithmetics, scientific computations, and statistical functions. Ⅳ. Whether you're a student, professional, simply in need small calculator, this product is suitable for all. Ⅴ. Its attention to detail as addition to any workspaces productivity calculator. Ⅵ. Size：about 85X137MM/3.35x5.39in Ⅶ. Color： Ⅷ. Digits：12 Digits Ⅸ. Battery：Need 1AAA Battery（Battery Not Included） Ⅹ. Package Includes: 1PC Calculator Ⅺ. note: Due to the problem of lighting effects，there might be tolerances in product, please understand. Ⅻ. Please allow 1cm errors due to measurement.