12-Digit Solar Battery Office Calculator With A Big Sensitive Button And Dual Product Features Dual Power: Solar energy and battery backup power keep the desktop calculator working in low light conditions (not including AA batteries) Desk Calculator Large Display: 12 digits display and large numbers , easy to use. Big Button: The electronic desktop calculator adopts a scientific large button design, which conforms to human habits and is comfortable to touch. Basic Calculator - Add, subtract, multiply, divide, backspace, % and MU. Auto-off when you do not use it about 10 minutes NOTE: Some user may use desk calculator in the early morning or night. The screen maybe difficult to read in low light without battery power. Please insert our AA battery for continuous and accurate usage. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!