Unlock the power of mathematics with the Casio FX-991ES Plus 2nd Edition scientific calculator. This advanced calculator features a variety of functions and capabilities to help you tackle even the most complex equations. With a battery power source and a sleek design, this calculator is perfect for use in the office or on-the-go. The FX-991ES Plus 2nd Edition is manufactured in India and is a reliable choice for any business or educational setting. Trust in the brand name of Casio and the precision of this calculator to help you excel in your work.