3-IN-1 MULTIFUNCTION: The pocket calculator combines a scientific calculator, a 6-inch LCD writing tablet, and a magnetic pen. Ideal for calculating, writing, and drawing for efficient operation. CLEAR AND PRACTICAL DISPLAY: A 12-digit display allows simultaneous calculation and writing. Suitable for accurate data recording without additional tools. SILENT SILICONE KEYS: Soft keys provide quiet operation, making the device suitable for collaborative learning or quiet environments. ENVIRONMENTALLY FRIENDLY AND EYE-FRIENDLY: The reusable LCD writing board reduces paper usage and helps prevent eye strain with flexible LCD technology. PORTABLE AND FOLDABLE: The ultra-thin, compact design is easy to carry and ideal for school, office, or travel. Practical and versatile. RELIABLE POWER SUPPLY: Powered by two replaceable CR1220 button cell batteries with solar support for enhanced reliability. Low power consumption and long service life. PRODUCT SPECIFICATIONS Material: Silicone, ABS Operating temperature: 0C - 40C Dimensions: 160 x 78 x 12.8 mm Battery type: CR1220 (for LCD writing board) Weight: 120 g (total weight of housing) Writing pressure: 150 g - 300 g Folding design: 10 - 90 foldable Display digits: 12 digits Solar charging: Supports solar energy Three-in-one function: Combines a pocket calculator, writing tablet, and pen for calculations and drawings. Magnetic stylus enables smooth operation. Well-thought-out design: Delete button quickly clears the screen. Hinge lock mode helps prevent accidental deletion. Environmentally friendly and easy on the eyes: Reusable LCD writing tablet reduces paper consumption and helps reduce eye strain with flexible LCD technology. Portable and compact: Ultra-thin and foldable design, ideal for school, office, or on-the-go use. Versatile for learning, writing, drawing, and business tasks. Long-lasting battery: Operates on 2 replaceable CR1220 button cell batteries. No charging required. Minimal power consumption and extended service life for dependable performance.