Slim credit card design calculator adopts solar charging design, no battery or power supply needed; It can be applied at any time as long as it gets sufficient light, which is very convenient. Compact in size and light in weight, can be easily held in hands, and fit your pockets, pencil cases, backpacks and more. The credit card size calculator can be carried easily, which is very suitable for students in the school, accountants in the office, tellers in the bank and other people who need to calculate frequently. You will get 2 pieces of 8 digits ultra thin calculators, which are suitable for home, office and school use; You can share them with . Made of plastic, light but sturdy, not easy to break; Reliable material with a slim design makes this pocket calculator can serve you for a long time.