The UKs best selling solar powered scientific calculator, allowed in every UK exam where a calculator can be used. Suitable for use from KS 3, 4 and above, recommended for GCSE, A/AS Level and Higher. The large natural Textbook display shows mathematical expressions as they appear in your textbooks, which increases comprehension because results are easier to understand. Suitable for GCSE, A Level and above. LCD display. 9 variable. Non-stick keys. 10+2 -digit display. Auto shut-off. 260 functions. Mathematical functions include Square root, fractions, degrees. Recurring decimals. Verify function. Prime factorisation. Algebraic logic. Regression analysis. Statistical functions. Hyperbolic. 24 levels of parenthesis. GRAD. Dual power source - Solar with battery back up. General information: Batteries required 1 x button cell . Manufacturers 3 year guarantee.