ELEVEN SR-135N Black

The Eleven SR-135N scientific calculator is a reliable tool for secondary school and university students, as well as for practical technical calculations. It offers a total of 240 integrated functions, covering everything from basic operations to advanced statistics and working in different number systems. The clear two-line display shows both the entered expression and the result simultaneously, making it easy to check calculations. Thanks to its dual power system, the calculator runs on solar energy and automatically switches to battery power when there isn't enough light.

Clear display and easy operation

The two-line, 10-digit display makes working with calculations significantly clearer. You can see the mathematical expression you've entered on the top line and the result on the bottom line, which lets you easily check and correct any mistakes without having to re-enter the entire problem. The durable plastic keys have a logical layout for intuitive use. To save energy, the calculator is equipped with an auto power-off function that activates after a period of inactivity, extending the battery life.

Wide range of scientific functions

With this calculator, you can handle a wide range of mathematical tasks. Among the total of 240 integrated functions are standard trigonometric (sin, cos, tan, cot) and hyperbolic functions, calculations with fractions, powers, roots and percentages. For more advanced users, statistical calculations are available, such as standard deviation, regression analysis, or permutations and combinations. The calculator also handles ENG engineering notation, Pi and the probability function.

Dual power and number systems

Dual solar and battery power ensures reliable operation in any light conditions. When there is enough light, the calculator uses energy from the solar panel, saving the inserted battery. The battery serves as a backup power source in darker environments. The SR-135N model will also be appreciated by computer science students thanks to its ability to perform calculations and conversions between number systems – decimal (DEC), binary (BIN), octal (OCT), hexadecimal (HEX), and quinary (PEN).