Basic calculator CASIO SL-310UC-BU — pocket solar, 10 digits, 29 keys, LR54 battery, blue

The Casio SL-310UC-BU Pocket Blue is a compact basic calculator with a 10-digit single-line display designed for everyday arithmetic and simple financial tasks. Its dual power source—solar panel with battery backup—ensures uninterrupted operation in various lighting conditions. The slim, pocket-sized design and tactile keys make it convenient to carry and use for on-the-go calculations.

Advantages

This Casio calculator provides reliable basic arithmetic functions alongside dedicated tax and profit calculation modes, reducing manual steps for business-related sums. The 10-digit display presents results clearly while the solar/battery power system extends operating time and reduces the need for frequent battery changes. Lightweight construction and a compact footprint allow easy storage in a pocket, purse, or briefcase.

Suitable for

• Quick arithmetic and daily calculations
• Small business tax and profit estimations
• Students needing a simple calculator for homework and study
• Portable use during travel, meetings, or fieldwork

Key specifications

• Display: 10-digit single-line LCD
• Power: Solar cell with battery backup for low-light conditions
• Functions: Basic arithmetic, tax calculation, profit calculation
• Design: Pocket-sized form factor with tactile keys
• Color: Blue casing

How to use

Turn the calculator on and use the numeric and function keys to perform standard arithmetic operations. Use the dedicated tax and profit function keys to enter rates and compute inclusive or exclusive amounts according to on-device prompts. The solar cell will power the device in sufficient light, while the battery automatically supplies power when light is insufficient. Refer to on-button labels for clearing entries and correcting input errors.

Recommendations

Place the calculator in a well-lit area to maximize solar operation and reduce battery use. For consistent performance, avoid exposing the device to extreme temperatures or moisture. Store the calculator in a protective pocket or case to prevent key wear and surface scratches when carried with other items.