1. Smart calculator and LCD writing board with a 12-digit display, allowing you to calculate while recording notes. 2. The writing board supports repeated writing, enabling you to write and record information anytime without paper or ink, offering convenience, practicality, and environmental friendliness. 3. LCD screen designed without blue light emission to help protect eye health. 4. Equipped with erase and lock buttons; press the erase button to clear the entire screen, and use the lock button to prevent accidental data deletion. 5. Powered by replaceable batteries, no charging or power cable required. Low power consumption ensures extended service life. 6. Compact and foldable design for easy storage and portability. 7. Versatile usage suitable for children and adults at home, office, school, and other settings. Specifications: Screen Size: 6 Inch Battery: 2 x 1220 Button Cell (included) Unfolded Size: approximately 16 x 15.6 x 0.5 cm Folded Size: approximately 16 x 7.8 x 1.2 cm Color: Black Material: ABS Dimensions: 160 x 77.5 mm Package Contents: 1 x Foldable Calculator & LCD Writing Tablet 1 x Pen 1 x English Manual Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3 cm.