1. Introduction
Thank you for choosing the CATIGA CD-8185 Desktop Calculator. This manual provides essential information for the proper setup, operation, and maintenance of your calculator. Please read it thoroughly to ensure optimal performance and longevity of your device.
2. Setup
2.1 Power Sources
The CATIGA CD-8185 calculator operates using dual power sources: solar energy and a pre-installed LR44 battery. For initial use, ensure the battery is properly seated. The solar panel provides power in well-lit environments, extending battery life.

Image: The calculator's dual power sources, including the solar panel and the internal battery.
3. Operating Instructions
The CATIGA CD-8185 features a user-friendly design with large, responsive buttons and a clear 8-digit LCD display. The tilted display angle enhances visibility, reducing eye strain during use.

Image: Close-up of the calculator's user-friendly design, highlighting large responsive buttons and anti-slip rubber pads.
3.1 Basic Operations
- Power On/Off: Press the 'ON/C' button to turn on the calculator. The display will show '0'. The calculator automatically powers off after approximately 6 minutes of inactivity to conserve energy.
- Number Entry: Enter numbers using the numeric keypad (0-9).
- Arithmetic Functions: Perform addition (+), subtraction (-), multiplication (x), and division (÷) using the respective function keys.
- Percentage: Use the '%' button for percentage calculations.
- Square Root: The '√' button calculates the square root of the displayed number.
- Clear Entry: The 'CE' button clears the current entry, allowing correction without clearing previous calculations.
- Equals: Press the '=' button to display the result of a calculation.
Video: An overview of the CATIGA CD-8185 calculator, demonstrating its design and various color options. This video highlights the product's aesthetic and general functionality.
4. Maintenance
To ensure optimal performance and longevity of your CATIGA CD-8185 calculator, keep it clean and dry. Use a soft, dry cloth to wipe the surface. Avoid exposing the calculator to extreme temperatures, humidity, or direct sunlight for prolonged periods. Do not use abrasive cleaners or solvents, as these can damage the display or casing.
5. Troubleshooting
5.1 Blank or Dim Display
If the display is blank or dim, ensure the calculator is in a well-lit area for solar power. If the lighting is sufficient and the display remains dim, the internal LR44 battery may need replacement. Replace the battery if necessary. If issues persist, please contact customer support.
6. Specifications

Image: The CATIGA CD-8185 calculator displaying its physical dimensions.
| Feature | Detail |
|---|---|
| Model | CD-8185 |
| Display | 8-Digit LCD, 4 Inches Screen Size |
| Power Source | Dual (Solar Powered and 1 LR44 battery, included) |
| Functions | Standard (Add, Subtract, Multiply, Divide, Percent, Square Root, Grand Total, CE) |
| Dimensions | 6 x 4 x 0.1 inches |
| Weight | 4.6 ounces |
| Material | Sturdy plastic body |

Image: The calculator's large, easy-to-read 8-digit display.
7. Warranty and Support
For product support or inquiries, please refer to the contact information provided with your purchase. The product includes a 30-day return policy. Lifetime phone support is available from 9 AM to 5 PM PST.
- Return Policy: 30-day unconditional return guarantee.
- Customer Support: 24/7 customer support available.
- Phone Support: Lifetime support by phone, 9 AM - 5 PM PST.



