Lichamp Desk Calculators, Office Desktop Calculator Basic 12, Large Display. Functional Instruction: ON/AC key: turn on/clear M+/M- key: memory plus or minus MRC key: memory total value and clear memory GT key: summation calculation OFF key: turn off MU key: profit and loss operation Item Specifications: Item name: 4 pack calculators Compatible: for everyone, home, office, student Product type: Arithmetic calculator Powerd By: Dual power solar and battery (battery included) Size: 5.7 x 4.7 x 1.8 in (1 piece) Weight: 4 oz (1 piece) Material: ABS plastic Display number: 12 Color: Black and Silver Package includes: 4 x Lichamp Basic Calculator 4 x AA Batteries Product Features 1) Large display: 12 digits large LCD display and large numbers, eye-angled, easy to read. 2) Dual power: solar (works only when it is bright) and battery (one AA battery included). 3) Basic calculator: add, subtract, multiply, divide, backspace, % and MU, auto-off when you do not use it about 10 minutes. 4) Wide application: Common math and financial functions, perfect choice for school, office, business and home use. 5) Note: The screen is 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!