1. Introduction
This manual provides detailed instructions for the iPepul Scientific Calculator with an integrated notepad. Designed for students and professionals, this device combines a 10-digit scientific calculator with a reusable writing pad, enhancing efficiency for various calculations and note-taking tasks. Its compact and portable design makes it suitable for classroom, office, and home use.
2. Product Components
Familiarize yourself with the key components of your iPepul Scientific Calculator:
- 10-Digit LCD Display: For clear viewing of calculations.
- Scientific Keypad: Features standard and advanced mathematical functions.
- Writing Area: An integrated blue matte LCD screen for digital note-taking.
- Magnetic Stylus: For writing on the notepad, conveniently stored on the device.
- Reset Button: To clear the writing area with a single press.

Figure 2.1: Overall view of the iPepul Scientific Calculator, highlighting the 10-digit display, writing area, soft silicone keyboard, reset button, and magnetic stylus. Dimensions are shown as 3.05 inches width for the calculator side, 6.1 inches total width when open, 6.2 inches height, and 4.8 inches for the stylus.

Figure 2.2: Close-up view of the iPepul Scientific Calculator's scientific buttons and the blue matte LCD screen, designed for eye protection.
3. Setup
3.1 Battery Installation
The calculator requires 2 Lithium Metal button batteries (included). To install or replace batteries:
- Locate the battery compartment on the back of the calculator.
- Carefully open the compartment cover.
- Insert the two Lithium Metal batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.

Figure 3.1: Illustration demonstrating the easy replacement process for the button battery, showing how to access the battery compartment.
4. Operation
4.1 Power On/Off
- To turn on the calculator, press the ON/C button.
- To turn off the calculator, press the OFF button.
4.2 Basic Calculator Functions
Use the scientific keypad for standard arithmetic operations (+, -, ×, ÷) and advanced functions (e.g., sin, cos, tan, log, square root, exponentiation). Refer to the button labels for specific functions.
4.3 Using the Notepad
The integrated blue matte LCD screen allows for convenient note-taking and rough work. Use the provided magnetic stylus to write directly on the screen. The screen is designed to be eye-protective.

Figure 4.1: User demonstrating the repeated writing function on the notepad, emphasizing its environmental benefits by reducing paper consumption.
4.4 Clearing the Notepad
To erase content from the notepad, press the circular Reset button located at the bottom center of the writing area. This action clears the screen instantly.
Video 4.1: Official product video demonstrating the foldable scientific calculator with its integrated pen and writing pad. The video highlights the dual functionality for calculations and note-taking.
5. Maintenance
5.1 Battery Replacement
When the display becomes dim or unresponsive, it may be time to replace the batteries. Follow the steps in Section 3.1 for battery installation.
5.2 Cleaning
To clean the calculator and notepad screen, use a soft, dry cloth. Avoid using abrasive cleaners or solvents, as these can damage the surfaces.
6. Troubleshooting
- Dim Notepad Display: The writing pad's visibility can be affected by ambient light. Ensure you are using the notepad in a well-lit environment.
- Writing Not Registering Properly: Apply firm, consistent pressure with the stylus when writing. If the issue persists, ensure the stylus tip is clean and undamaged.
- Calculator Moves During Use: For optimal stability during use, place the calculator on a flat, non-slip surface.
7. Specifications
| Product Dimensions | 6.5 x 3.27 x 0.04 inches |
| Item Weight | 4.2 ounces |
| Item Model Number | JSQ |
| Batteries | 2 Lithium Metal batteries (included) |
| Power Source | Battery Powered |
| Calculator Type | Engineering/Scientific |
| Screen Size | 7.8 Centimeters |
8. Portability
The iPepul Scientific Calculator is designed for maximum portability, weighing only 120g and featuring a slim profile. Its foldable design allows it to be easily carried in a bag, pocket, or wallet, making it an ideal companion for on-the-go calculations and note-taking.

Figure 8.1: Image showcasing the compact and portable design of the iPepul Scientific Calculator, illustrating its size comparison to a smartphone and its ability to fit into a backpack.