1. Smart calculator and LCD writing board with a 12-digit display, allowing you to calculate while recording information. 2. The writing board supports repeated use; write and record notes anytime without paper or ink—convenient, practical, and eco-friendly. 3. LCD screen emits no blue light, helping protect eye health. 4. Equipped with erase and lock buttons; clear the entire screen with the erase button. The lock function helps prevent accidental data loss. 5. Uses replaceable batteries—no charging or power cord required. Low power consumption with extended battery life. 6. Compact and foldable design for easy storage and portability. 7. Versatile usage suitable for children and adults at home, in offices, schools, and other settings. Specifications: Screen Size: 6 Inch Battery: 2 x 1220 Button Cell (included) Unfolded Dimensions: approximately 16 x 15.6 x 0.5 cm Folded Dimensions: approximately 16 x 7.8 x 1.2 cm Color: Black Material: ABS Size: 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 color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.