Basic Calculator, 14 Digit Desktop Calculator with Large LCD Display, Desk Calculator Battery and Solar Powered for Office, School, Home & Business Use Built with a sturdy and premium plastic body, the Office Calculator is constructed with everyday use in mind. It is convenient, powerful, and long lasting. Its spacious button size ensures that your fingers are much less likely to hit the wrong number, all while typing with a satisfying feeling Size: 21.3 * 15.8 * 3.75cm Material: Metal Control Board + Plastic Buttons Specifications: 14-bit Calculator Power Source: Solar, Battery Display Type: LCD Function: Root Calculation, Rounded Round Calculation, Two Decimal Calculation Switches, Automatic Shutdown 1:14 Big Widescreen Display, Meet The Daily Large Amount of Calculation Needs, Large Screens and Fonts To Clearly Observe the Calculation Results 2: High-Penetrating Acrylic Plate Protection Display Panel, Protect The Screen, Not easy to Draw 3: Battery + Solar Dual Power Drive, long-la casting, Long Working Hours 4: Use a plastic button, Clear Number, Comfortable, Not easy to Wear 5: Comfortable Tilt Angle, Make The Calculator's Screen of The Natural State of The Human Eye 6: With 150 Steps, Each Step is Calculate Before The Review 7: Deli 14-Digit Desktop Calculator Dual Power Extra Large LCD Display [GIANT CLEAR DISPLAY] ​- Large and clear 14-digit display screen allows for easy readability and usage, relieving any strain on your eyes. [USEFUL FUNCTIONS] ​- Grand Total/Markup/Memory Clear and Recall/Memory Add/Subtract Function keys help with basic and complex calculations. [LARGE EASY TO USE DESIGN] ​- Large buttons and Easy To Read Display make it simple and convenient to use, whether at home or the office. [EFFICIENT ENERGY SOURCE] ​- Dual solar energy and battery power sources give this product a long-lasting battery life, so you never have to worry about running out of power. Also has Auto Power-Off. The calculator will turn itself off after about 6 minutes of being idle. [HIGHLY DURABLE] ​- Well built and durable plastic keys allow for constant use without any wear and tear, giving you the feel of quality.