Calculator For The Desk, 12-Digit Solar Battery Office Calculator, Big Sensitive Product Details 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. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.