The OEM Sharp 12 Digit Desktop Handheld Calculator SHREL339HB features an extra-large, 12-digit liquid crystal display (LCD) with punctuation. It includes a low-noise keyboard, a durable metal case, and a convenient kick stand. This calculator offers a 4-key memory system, which includes memory plus, memory minus, recall memory, and clear memory keys. Additional functions include grand key total, cost/sell/margin, percent and sign change keys, and answer check. It operates on solar power with a battery backup for reliable performance.