Festival Selection ！！: Calculator 12 Digit Desktop Basic Calculato Dual-Power with Large LCD Display Feature: Two-way Power: Solar(works only when it is bright) and Battery. Automatic shut-down (8 minutes don't use), energy saving and environmental protection. Very Practical:The beautiful buttons and easy to read display make the calculator super child friendly. performs common math as well as various financial functions, perfect for both adults and students. Big LCD Display Screen:Displays up to 12 digits Extra-large LCD display., humanized 30-angle display design, We use the specially modulated pigment for the display screen which improves the clarity of the display screen greatly. High Quality: Percussion keyboard ergonomic design, clear sound, after 100 thousand times of tapping test, not easy to bond. Unique Design:The bottom of the calculator has a non-slip gasket, which is not easy to slip during operation. With a hard plastic body the Calculator is built with everyday use in mind.Good sense of touch, ABS plastic material, light weight. Reasonable configuration and comfortable operation. Package includes: 1X Calculator (1*AA Battery not include) Use occasion: Ideal for school, study, and office tasks Twoway power source: Operates on solar power (only in bright conditions) and battery for versatility Automatic shutdown feature: Saves energy by turning off after 8 minutes of inactivity Childfriendly design: Features beautiful buttons and an easytoread display, making it suitable for both adults and students Large LCD display: Shows up to 12 digits with a humanized 30degree angle design for improved visibility