PORTABLE SIZE: 5.5\" x 3.4\", automatic sleep mode, two years of use. Very light, easy to put in pockets, bags. LARGE DISPLAY: Large button, candy color. Large LCD screen, 12-digit display, vertical back, 15-degree angle for easy-to-read counter. An LR44 battery is included in the package. USAGE Scenario: Made of durable ABS material. Yellow-white, pink-white, orange-white, pure white, pure green, a variety of fashion styles. Small and portable general desktop calculator for home, school, office or shop, can do regular math as we do Has a variety of financial functions, excellent for adults and students DURABLE SILICONE BUTTONS: Good feel, ABS plastic material, light weight. Reasonable configuration, convenient operation, automatic shutdown, independent memory, M+, M-, total (GT), Delete key (▶). Anti-slip design, with anti-slip washers, it is not easy to slide during operation. CONVENIENT SCHOOL SIZE CALCULATOR: This large calculator is designed to sit flat on a desk, countertop, or table for easy use, yet it's compact enough to take with you on the go.