Features Handwriting Board Design This handwriting board calculator is equipped with a handwriting board and provides a convenient handwritten input method for quickly and easily recording calculation results. MULTIFUNCTIONAL In addition to the four basic operations, this handwriting tablet calculator also supports statistical calculations, drawing images and many other calculation needs. Wide Application This handwriting tablet calculator has a wide range of applications and can be used for accounting, school, exams and more. Solar Powered This handwriting tablet calculator is powered by solar charging technology without batteries, which is environmentally friendly and energy saving for long-term use. Folding Design This handwritten tablet calculator adopts folding design, it can be easily folded into your pocket or school bag, and easy to carry. Specification: Item Type:Handwriting Tablet Calculator Material: LCD, ABS. Notes: (Comes with built-in battery) Computer battery: Battery type: button cell LR1120. Battery capacity: 50 mAh. LCD Writing Board Battery: Battery type: button cell CR1220. Battery capacity: 40 mAh. Package list: 1 x Handwriting Tablet Calculator 1 x pen. 1 x user manual (English language Package List 1 x Handwriting Tablet Calculator 1 x Pen 1 x Manual