Two-way : Solar (works only when it is ) and Battery (included,long battery life.).Automatic shut-down (8 minutes don't use), energy saving and environmental protection.Big LCD Display Screen:Displays up to 12 digits Extra- LCD display., humanized 45-angle display design, We use the specially modulated pigment for the display screen which improves the clarity of the display screen greatly.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.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 mindGood sense of Contact, ABS plastic material, light weight. Reasonable configuration and comfortable operationTo that the human body does not feel tired during long-term use.Batteries: 1 AAA batteries required. (included)colour:pinkMaterial:ABSsize:165x10x14CMPackage Contents:1 x calculatorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.