1、LARGE ROUND KEYS: The 28 keys calculator is made of ABS material imitating a mechanical keyboard with large retro round keys that are comfortable to touch and easy to press with your fingers. 2、DUAL POWER SUPPLY: This calculator has both solar and battery power supply modes, which can be recharged by solar energy when there is light, no need to replace the battery. 3、12 DIGIT DISPLAY: The retro calculator features a 12 digit LCD display with specially formulated pigments to improve the clarity of the display and make it easy to read. 4、BEAUTIFUL AND EASY TO USE: This calculator has the right size and is designed to lay flat on a desk, countertop or table for easy access, beautiful and convenient. Lightweight and portable. 5、MULTIPLE APPLICATIONS: Desktop calculator is suitable for office, business, school students, stores, malls, daily and home scenarios, you can also give it as a practical gift to friends, students. Item Type: Dual Power Calculator Material: ABS Battery Type: 1 x AAA Battery (Not Included) Support: Solar Power Keys: 28 Keys Wide Screen Display: 12 Digits Auto Shutdown: Intelligent Shutdown 1 x Dual Power Calculator