Buti Calculator (Magic Calculator V3)

As the ultimate addition to our smart stationery lineup, the buti Calculator (Magic Calculator V3) is engineered for individuals who need instant, discreet access to their most important information. From the outside, it is an ordinary, fully functional calculator. On the inside, it is a secure vault for your text notes, reference images, and digital documents.

Whether you need to review critical formulas, read detailed notes, or keep important data close at hand in strict environments, the buti Calculator provides a flawless cover.

🤫 Engineered for Absolute Stealth

• Maximum Security Privacy Screen

  No need to worry about wandering eyes. The buti Calculator comes equipped with a pre-installed Privacy Film. While the text is perfectly clear to the user looking straight at it, anyone sitting beside you or walking past will only see a black screen.

• The Instant Panic Button Never get caught off guard. If someone approaches, a single tap of the “=” button instantly shuts down your media and locks the display back to a standard, functional calculator interface.

• Whisper-Quiet Keystrokes

  Unlike standard clicky keyboards, this device is equipped with a silicone conductive sheet beneath the keys. This requires a slightly firmer press but guarantees completely silent operation—perfect for environments where absolute quiet is required.

• Hidden Hotkeys for Quick Access Bypass the menus completely so you are always one step ahead. From the main calculator screen, long-press “AC” to instantly open your text notes, or long-press “DEL” to pull up your image gallery.

📖 Your Essential Document Vault

• Built-In Storage & Included Cable: Out of the box, the device features a solid 4GB of internal memory—plenty of room for thousands of text files and images. A USB cable is included in the package for easy data transfer and charging from your PC. Need more room? Expand it up to 64GB via the TF/MicroSD slot.

• Formula & Diagram Viewer: Save your complex diagrams or math formulas as JPEG or BMP images and view them directly on the 2.4-inch color screen.

• Smart E-Book Mode: Read long .txt documents effortlessly with customizable font sizes, dark background options, and a hands-free auto-reading mode (adjustable from 5 to 30 seconds).

💡 Important Guidelines for Formatting Your Notes

To get the absolute best visibility on the 320×240 pixel screen, ensure your images or screenshots of formulas are formatted to a 4:3 ratio before transferring. If you are saving text as an image, use thick, dark fonts and maximize the contrast on your computer to ensure it is perfectly legible on the device. To maintain battery health, always charge using a low-current source (less than 0.8A) like your laptop’s USB port.

Technical Specifications