"Effortlessly Crunch Numbers with Precision: Introducing the Ultimate OSALO Calculator!" OSALO is a brand that is all about functionality and design. It was founded by a team of engineers who wanted to create high-quality calculators that are both stylish and easy to use. Whether you are a student, a professional, or just need a calculator for everyday use, OSALO has the perfect product for your needs. OSALO calculator brand is focused on innovation, quality, and reliability. Our brand philosophy is inspired by the idea of "Simplicity in Complexity." OSALO embraces innovation as a core value in our products. We are constantly developing new technologies and features that provide improved functionality and convenience to users. Some of these innovations include touchscreen displays, ergonomic designs, and advanced mathematical functions. Our scientific calculator utilizes textbook-like written display technology to enhance the readability of mathematical symbols and ease of operation. Dual power sources—solar and battery—ensure continuous functionality, even during critical exams or assignments. With premium sensitive keys and smart history feature, you can quickly retrieve and effortlessly reuse or edit previous formulas. It has 417 functions and covers most of the needs of scientific functions that students may need in math, physics, chemistry, etc. How do I change the setting from fractions to decimal answers? You can change the result with the ‘S⇔D’ key; or you can configure the calculator settings: 1. Press the ‘SHIFT’ key. 2. Press the ‘MODE’ key. 3. Select 1 or 2 to set the mode for fractions or decimals. MthIO for fraction and LineIO for decimal. How to adjust display contrast？ 1. Press the ‘SHIFT’ key 2. Press the ‘MODE’ key 3. Press the ‘ ↓ ’ key 4. Press the 6: < CONT > 5. Press ‘ ← ’ and ‘ → ’ key to adjust contract How to replace the battery？(Removing the battery will cause all of the calculator's memory contents to be deleted) 1. Press ‘SHIFT’ ‘AC’ (OFF) to turn off the calculator 2. Unscrew the screw on the top right corner of the backside 3. Replace the battery, taking care that its plus (+) and minus (-) ends are facing correctly 4. Initialize the calculator Desktop Calculators Desktop Calculator Calculator 401 Function 240 Function New Version Tax Calculator