Feature:1. Multi Purpose: The portable calculator is versatile, it is both a calculator and a writing pad, which can be written repeatedly.2. 10 Digit Display: Calculator notepad uses a 10 digit large screen, and multi digit numerical display improves work efficiency.3. Dual Power Drive: The solar folding calculator is equipped with a solar panel with a button battery inside, which doubles to ensure uninterrupted power.4. Lightweight Portable: 10 digit digital calculator weighs only 128G and is made of light and environmentally friendly materials, making the overall body lighter.5. Clamshell 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 x Calculator Notepad1 x English User ManualNote:Ships without battery.