Valued Set: You will get 4 packs of handheld desktop calculators, each calculator measures 5.5"x4.7"x1.57". The adequate quantity will perfectly meet your computational demand. You can share them with your family or friends. High-Quality Material: Noamus standard functional desk calculator is mainly made of high-quality plastic, durable and sturdy, with two small non-slip mats under the bottom prevent it slipping around, which keeps it can serve you last for a long time. Dual Power: With solar and battery dual power, the basic calculator can be completely powered as long as you use it in the light environment. It is recommended to install a battery so that you can use it in the absence of light. It is really an excellent choice for you. (Contains no battery). Thoughtful Angle and Big Button: The cute calculator with inclined viewing angle, upright display, not easy to reflect light, providing the best user experience. With big sensitive buttons, you can use it smoother and faster. Versatile: With the 12 digit large display, the aesthetic office compute supplies will protect your eyes easily. It is great for common math and financial functions, perfect choice for school, office, business and home use. Suitable for businessman, worker, teacher, student, store, mall daily used. Auto-off when you do not use it for about several minutes.