Features 1Multi Purpose: The portable calculator is versatile it is both a calculator and a writing pad which can be written repeatedly. 210 Digit Display: Calculator notepad uses a 10 digit large screen and multi digit numerical display improves work efficiency. 3Dual Power Drive: The solar folding calculator is equipped with a solar panel with a button battery inside which doubles to ensure uninterrupted power. 4Lightweight Portable: 10 digit digital calculator weighs only 128G and is made of light and environmentally friendly materials making the overall body lighter. 5Clamshell Design: Desktop calculator with 10 digit large display adopts a clamshell design which is light and easy to fold in half for easy portability. Specification Item Type: Calculator NotepadMaterial: PP Shell SiliconeProduct Color: BlackPower Supply Mode: Sun Lamp or Button BatteryBattery Model: CR1220 3V Button Battery Package List 1 xCalculatorNotepad1 xEnglish User Manual Note Ships without battery.