Dual Powered Ways - Solar energy and battery backup dual power module, make the desk calculator low power consumption, more energy efficient. The battery life will automatically be powered by solar energy on after exhaustion. 1 x AAA batteries included.<br> Easy to Read Desk Calculator - 12-digit screen display for easy arithmetic, clear and crisp numbers, easy to read, and will improve the efficiency of calculation.<br> Compact & Portable - -The electronic desktop calculator adopts a scientific large button with compact design, which conforms to human habits and is comfortable to touch, the prints will not easily fade for years of usage.<br> Basic Calculator Memory load/clear, percentage, divide, backspace, and MU keys. Auto-off when you do not use it about 10 minutes.<br> Suitable for businessman, worker, teacher, student or anybody that needs make any sort of calculation from time to time