<p>The <strong>SONAM ST-405 Desktop Calculator</strong> is a powerful and easy-to-use 12-digit calculator ideal for office, school, and home use. Designed with a large display, dedicated tax keys, memory functions, and auto-correct options, it delivers fast and accurate calculations for everyday tasks.</p> <p>With its <strong>Two-Way Power</strong> (solar + battery), the ST-405 ensures uninterrupted performance. The big, soft-touch keys make typing comfortable, while the angled display reduces glare for better readability.</p> <ul> <li><strong>12-digit display</strong> — perfect for accounting and large calculations.</li> <li><strong>Two-Way Power</strong> — solar-assisted with battery backup.</li> <li><strong>Dedicated TAX+, TAX–, MU & GT keys</strong> for quick business calculations.</li> <li><strong>Big soft keys</strong> for comfortable and error-free input.</li> <li><strong>Auto-correct & auto-review features</strong> for accurate results.</li> </ul>