Transparent Calculator, Solar Computer,Calculator With Solar Calculator, Screen Calculator, Features: Solar calculator: powered by solar energy and does not require external batteries. screen calculator: An 8-digit number displayed on the screen. Transparent calculator - uses a transparent screen for digital input, which is very convenient. screen scientific calculator: small size, light weight, easy to use, and easy to carry. School, home, and office can all be used. Student calculators: including handheld or desktop general-purpose calculators. Product Description: Including: 1x calculator Built- in for automatic on and off. It will automatically power off after 1- 2 mins if not use. Compact size, light weight, easy to use and convenient for carry. powered solar energy, no external battery needed. Customer Service:If you have any questions about this product or encounter any problems,just feel free to contact us to get a satisfactory solution within 51 hours. Good quality,creative exterior design,and timely customer service