--- product_id: 621668775 title: "991MS 401 Functions 2-Line Display Desktop Calculator with Sliding Cover | ROATEE Scientific Calculator School Supplies Solar Battery Dual Power Kawaii for Middle High School Student and Teacher Blue" brand: "roatee" price: "AED 90" currency: AED in_stock: true reviews_count: 13 category: "Roatee" url: https://www.desertcart.ae/products/621668775-991ms-401-functions-2-line-display-desktop-calculator-with-sliding store_origin: AE region: United Arab Emirates --- # solar + battery power 401 advanced functions 2-line dual display 991MS 401 Functions 2-Line Display Desktop Calculator with Sliding Cover | ROATEE Scientific Calculator School Supplies Solar Battery Dual Power Kawaii for Middle High School Student and Teacher Blue **Brand:** roatee **Price:** AED 90 **Availability:** ✅ In Stock ## Summary > 🔬 Elevate your calculations — because your brain deserves a pro tool. ## Quick Answers - **What is this?** 991MS 401 Functions 2-Line Display Desktop Calculator with Sliding Cover | ROATEE Scientific Calculator School Supplies Solar Battery Dual Power Kawaii for Middle High School Student and Teacher Blue by roatee - **How much does it cost?** AED 90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ae](https://www.desertcart.ae/products/621668775-991ms-401-functions-2-line-display-desktop-calculator-with-sliding) ## Best For - roatee enthusiasts ## Why This Product - Trusted roatee brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power That Never Quits:** Dual solar panel and replaceable battery ensure uninterrupted performance during long study sessions. - • **Master Complex Calculations:** 401 scientific functions including integrals, matrices & vectors for next-level problem solving. - • **Built to Last & Travel Light:** Durable plastic body with a sliding dust cover keeps your calculator pristine on the go. - • **Dual-Line Display Efficiency:** View input and results simultaneously to speed up your workflow and reduce errors. - • **Precision at Your Fingertips:** Responsive, high-quality plastic keys deliver a satisfying tactile experience for fast, accurate input. ## Overview The ROATEE 991MS scientific calculator packs 401 functions into a sleek, durable design featuring a 2-line LCD display for simultaneous input and result viewing. Powered by solar energy plus a replaceable battery, it offers reliable, long-lasting use. Its dust-resistant sliding cover and responsive keys make it perfect for middle school to college students tackling complex math, science, and engineering problems. ## Description desertcart.com : 991MS 401 Functions 2-Line Display Desktop Calculator with Sliding Cover | ROATEE Scientific Calculator School Supplies Solar Battery Dual Power Kawaii for Middle High School Student and Teacher Blue : Office Products Review: Perfect Calculator for Middle School – My Daughter Loves It - purchased this scientific calculator for my daughter, who is in eighth grade, and it has been such a great buy! She absolutely loves it and uses it daily for her math classes. The layout is clear and easy to understand, with all the functions she needs for algebra and beyond. It’s not overly complicated, but still advanced enough to handle the more complex problems she’s starting to learn. She says the buttons respond smoothly and the display is easy to read, even when working through long equations. It feels sturdy and well-made, so I know it will last her through middle school and into high school. I also appreciate that it’s lightweight and portable, so she can keep it in her backpack without it taking up much space. Overall, it’s a reliable, user-friendly tool that makes her feel confident in her work. Five out of five—definitely worth it for any student! Review: Amazing for the price point - I picked up the 991ES Scientific Calculator with the attached drawing notepad for my college engineering classes, and it’s honestly one of the best study tools I’ve ever owned. The calculator itself performs just like any high-end Casio — fast, accurate, and easy to use. Very good for the price and It handles complex equations, trig functions, and conversions with zero lag, and the display is super clear with a natural textbook format that makes it easy to follow along with formulas. What really makes this setup shine is the notepad that’s built into it. I didn’t realize how useful it would be until I started using it every day. The magnetic stylus feels smooth, and being able to jot down quick notes, steps, or rough sketches right next to the calculator saves a ton of time. I use it constantly for solving statics problems and quick trigonometry sketches without flipping through my notebook. The build quality is solid, too. The buttons have that perfect clicky feel, the cover slides smoothly, and the notepad erases completely clean every time. It’s lightweight but feels sturdy enough to toss in my backpack without worrying about it. If you’re a student in math, physics, or engineering, this combo is worth it. Having both a professional-grade calculator and a small reusable notepad in one compact setup makes studying and problem-solving so much easier. I honestly wish I had bought it sooner — it’s one of those tools that just makes schoolwork smoother and more enjoyable. ## Features - Scientific Calculator for Students: ROATEE portable scientific calculator containing 401 functions such as scientific functions, scientific computation, complex number calculations, integrals, matrix calculations, vector calculations and so on.Suitable for middle school courses such as general mathematics, statistics, chemistry, biology, and general science - 2-Line Display: Showing input and calculation results at the same time on the display. Greatly improves computational efficiency - Dust-resistant and Durable: ROATEE scientific calculator comes with a dust cover that can be placed at the back while in use and covered after use to prevent dust from entering. The portable size and durable material designed for students are not only convenient for storage and carrying but also have a longer service life - Dual Power Supply & More Sensitive Key: Solar panel + replaceable button battery for long term use. High quality plastic buttons, more sensitive and precise than silicone buttons, more comfortable to touch - Essential School Supplies: Suitable for SAT, GCSE, etc...Functionally complete with a stylish design, color scheme, and exterior, making it highly suitable for middle school students and above ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CHVZKRVC | | Best Sellers Rank | #1,304 in Office Products ( See Top 100 in Office Products ) #11 in Scientific Calculators | | Brand | ROATEE | | Calculator Type | Engineering/Scientific | | Color | Blue | | Customer Reviews | 4.4 out of 5 stars 3,461 Reviews | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 6.3"L x 3.31"W | | Manufacturer | ROATEE | | Mfr Part Number | AC0401 | | Model Name | AC0401-U-5D-2001 | | Model Number | AC0401 | | Number of Batteries | 1 Lithium Metal batteries required. (included) | | Number of Items | 1 | | Power Source | Battery Powered | | Screen Size | 6.2 centimeters | ## Product Details - **Brand:** ROATEE - **Calculator Type:** Engineering/Scientific - **Color:** Blue - **Power Source:** Battery Powered - **Screen Size:** 6.2 Centimeters ## Images ![991MS 401 Functions 2-Line Display Desktop Calculator with Sliding Cover | ROATEE Scientific Calculator School Supplies Solar Battery Dual Power Kawaii for Middle High School Student and Teacher Blue - Image 1](https://m.media-amazon.com/images/I/71neDiCt4GL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect Calculator for Middle School – My Daughter Loves It *by A***L on October 1, 2025* purchased this scientific calculator for my daughter, who is in eighth grade, and it has been such a great buy! She absolutely loves it and uses it daily for her math classes. The layout is clear and easy to understand, with all the functions she needs for algebra and beyond. It’s not overly complicated, but still advanced enough to handle the more complex problems she’s starting to learn. She says the buttons respond smoothly and the display is easy to read, even when working through long equations. It feels sturdy and well-made, so I know it will last her through middle school and into high school. I also appreciate that it’s lightweight and portable, so she can keep it in her backpack without it taking up much space. Overall, it’s a reliable, user-friendly tool that makes her feel confident in her work. Five out of five—definitely worth it for any student! ### ⭐⭐⭐⭐⭐ Amazing for the price point *by J***S on October 9, 2025* I picked up the 991ES Scientific Calculator with the attached drawing notepad for my college engineering classes, and it’s honestly one of the best study tools I’ve ever owned. The calculator itself performs just like any high-end Casio — fast, accurate, and easy to use. Very good for the price and It handles complex equations, trig functions, and conversions with zero lag, and the display is super clear with a natural textbook format that makes it easy to follow along with formulas. What really makes this setup shine is the notepad that’s built into it. I didn’t realize how useful it would be until I started using it every day. The magnetic stylus feels smooth, and being able to jot down quick notes, steps, or rough sketches right next to the calculator saves a ton of time. I use it constantly for solving statics problems and quick trigonometry sketches without flipping through my notebook. The build quality is solid, too. The buttons have that perfect clicky feel, the cover slides smoothly, and the notepad erases completely clean every time. It’s lightweight but feels sturdy enough to toss in my backpack without worrying about it. If you’re a student in math, physics, or engineering, this combo is worth it. Having both a professional-grade calculator and a small reusable notepad in one compact setup makes studying and problem-solving so much easier. I honestly wish I had bought it sooner — it’s one of those tools that just makes schoolwork smoother and more enjoyable. ### ⭐⭐⭐⭐⭐ Great *by M***Z on July 30, 2026* Works awesome. My son loved it . --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ae/products/621668775-991ms-401-functions-2-line-display-desktop-calculator-with-sliding](https://www.desertcart.ae/products/621668775-991ms-401-functions-2-line-display-desktop-calculator-with-sliding) --- *Product available on Desertcart United Arab Emirates* *Store origin: AE* *Last updated: 2026-09-02*