Mr. Pen Solar handheld calculator 12-digit makes everyday math fast and easy for work, school, the market, and home. Standard function calculator — handles basic numerical calculations quickly and reliably. Big, sensitive keys — easy-to-press buttons support smooth, quick data entry. Everyday functions included — add, subtract, multiply, and divide with ease. Percent + MU key — calculate percentages easily, including MU key percent calculations with one press. Backspace correction — fix input mistakes without starting over. Compact size — portable 4.6" x 2.8" design that fits neatly on desks and in bags. Large 12-digit display — clear visibility from multiple angles. Battery included + auto-off — runs on one LR1130 button cell battery (included) and powers down after 8 minutes of inactivity.