Solar Calculator Handwriting Board Learning Office Portable Folding LCD Writing Board(Black)

1. Designed with an erase button and a lock button, allowing you to clean the entire screen with one click to prevent accidental deletion.2. One machine with multiple functions, can be used as an erasable writing board and a smart calculator at the same time, and supports calculation while writing.3. Made of high quality PP material, durable. Compact, lightweight, and foldable design for easy storage. Support repeated writing, no paper and ink required.4. Perfect for kids or adults to use at home, office, school, etc. The LCD screen has no blue light and protects the eyes.5. Ultra-thin design, magnetic closure coverParameter:1. Material: Eco-friendly ABS2. Font color: monochrome/thick handwriting3. Reflection rate: 25%-30%4. Screen: high-definition LCD screen, 10-digit display5. Working temperature: -0-40 degrees Celsius6. Battery: 1 x Button Cell CR1220 120mAh + Solar7. Features: solar energy, reusable, environmentally friendly8. Dimensions: combined: 160 x 78 x 7mm expanded 160 x 158 x 7mm9. Net weight: 145g