Osalo Scientific Calculator 240 Function 2 Line 10+2 Digits, Os 82Ms 2Nd Edition Product Features ?240 Functions Scientific Calculator?It is a professional scientific calculator that can be counted using stat-data editor calculations. The scientific calculator can also perform basic mathematical operations, including triangular functions, roots, n-th roots, percentages, scores, complex numbers, permutations, linear regression, standard deviations, and variable solving. ?Brightness Adjustment Function?The scientific calculator allows you to adjust the brightness of the screen for optimal display with a simple operation, dimming it to relieve eye fatigue and brightening it for clearer results. ?2-Line Scientific Calculator?Input expressions and arithmetic operations is more easy to read than traditional calculators. The 2 line display shows both input and calculation results, convenient for students to check the calculation process and results. ?Dual Power Source Electronic Calculator?Solar and battery, double safe uninterruptible power, environmental protection and energy saving advantages. ?Ultra-light Portable?Weight: 4.97oz. (141g); Size: 164 x 80 x 17(mm)/6.4 x 3.15 x 0.67(inch); Material: ABS plastic. With slide-on hard case, convenient to carry it outside and hold it on one hand. 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!