Features: Folding Design: Folding design, which is easy to carry, a pocket calculator that you must have. Battery Powered: 2 button batteries powered, can be replaced at any time without screw installation. 12 Digital Display: Extra-large 12 digits LCD display, calculation can be quick and easy. Gift Choice: Can be a delicate and decent gift,to your friends, students and colleagues. Screen Lockable: A calculator with writing board and pen. With screen lockable function, easy to use. Specification: Material: ABS Color: Black Size: About 16.5x15.5x1.3 cm/6.49x6.10x0.51 inch(L*W*H) Screen Size: About 6 in Pen length: About 10 cm/3.93 inch Battery: 2 x Button Batteries(Included) Package included: 1 * Desktop Calculator 1 x Pen