Feature: 1. Note Taking Function: This pocket desktop calculator has a notepad function with LCD writing pad, you can take notes during calculations, calls and meetings to improve your study and work efficiency. 2. Multifunctional: This desktop calculator has a lock key feature to save your important notes and prevent accidental deletion, and effectively performs 4 functions of mortgage calculations and tax conversions for financial, household, and accounting assistance. 3. Excellent ABS Material: This solar powered desktop calculator is made of excellent ABS material, which is sturdy and abrasion resistant, not easy to be damaged, and has a long service life. 4. Silent Buttons: This multi function calculator features silent buttons which are comfortable to hold and quiet when pressed, making it less likely to disturb others. And it's small and lightweight, so it's easy to carry and use. 5. Wide Application: This office desk calculator has a wide range of applications, small portable general purpose desktop calculator for home, school, office or shop, can do general maths and note taking as we do, has a wide range of financial functions, great for adults and students. Specification: Item Type: Calculator Material: ABS Size: Closed: Approx. 160 x 78 x 13mm / 6.3 x 3.07 x 0.51in, Expanded: Approx. 160 x 158 x 7mm / 6.3 x 6.22 x 0.28in Calculator Power Supply: Solar, Cell Battery Calculator Battery: LR1120 Cell Battery x 1 Capacity: 120mAh Handwriting Tablet Battery: CR1220 Cell Battery x 1 Capacity: 120mAh Operating Temperature：-10-40℃ Function: Night Scene Handwriting Tablet, Calculator. Package List: 1 x Calculator 1 x Stylus Pen 1 x Manual