Dual power: this 8 digit desktop calculator not only can be powered by batteries (button battery included), but also by solar power; Just put the solar panel under light, it will fully power the calculator, so that no need to worry about running out ofbattery when outside Quality made: these standard function calculators are made of quality plastic material, allowing for a long period of use and almost no wear and tear, you can rest assured to use; Featuring reliable quality, light weight and proper size with reasonableconfiguration, the function desktop calculator is easy and comfortable to operate, and the press keys are durable to use Multi-function: add, subtract, multiply, divide, total, %, M+/M-/MRC, automatic shutdown; Notice: the electronic calculator will automatically shut off after being idle for about 6 minutes, saving electricity General purpose: these LCD display calculators are designed for many occasions like business, office, home, school, financial project and so on, handy for carrying around with you anytime and anywhere What you get: the package comes with totally 3 pieces digital desktop calculators in 3 different colors (blue, orange, green), each one measures approx. 9.5 x 5.5 x 1 cm/ 3.74 x 2.16 x 0.39 inch, enough to meet your various daily uses