Upgraded 991Es Plus Desktop Scientific Calculator, Roatee Multiview 4-Line Product Details [911ES Multifunctional Financial Calculator] - ROATEE business financial calculator features 417 computing functions, which is more than the common scientific calculator on the market. And this can meet almost all of your daily computing needs. [Scientific Calculator with Notepad] - This scientific calculator intergrates calculation and notebook with a stylus pen. The lcd writing tablet enables you to take notes during the calculation, which do great help for study and work. [Dual Power Solar Panel Coin Battery] - The replaceble coin battery is built in this scientific calculator. It is also powered by solar energy so you don't need to worry about battery depletion. [Anti-Drop Body with High Durability] - The body of this scientific calculator undergoes rigorous quality tests. Due to the design of anti-drop body, no need to worry about the damage by accidentally falling. [Lightweight and Portable Design] - This lightweight scientific calculator only weighs 5 ounces. It can be easily put in your pocket, which is convenient for business and college. 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.