Multi-Function: Smart Calculator LCD writing tablet, 12 digits display, write while calculating, convenient and practical. Environmental Friendly: The writing pad supports repeated writing and paper free, no ink and no dust. LCD screen, no blue light, protect eyes. One-Click Erase: With an erase button, you can clear the full screen with a click. The drawing pad can be folded to lock screen to prevent accidental deletion. Replaceable Battery: Powered by 2 * CR1220 button battery, dual purpose and no need to charge. Ultra-low power consumption, long service life. Wide Application: Small and portable, folding storage, very suitable for children or adults use at home, office, school, etc. Specifications: Color: Black/ White/ Blue/ Red(optional) Material: ABS Screen Size: 6 Inch Battery: 2 * CR1220 Button Cell, 40mAh, 3V Item Size: 16 * 15.6 * 0.5cm/ 6.3 * 6.1 * 0.2in(Unfold) 16 * 7.8 * 1.2cm/ 6.3 * 3.1 * 0.5in(Fold) Item Weight: 120g/ 4.2oz Package Size: 17 * 8.4 * 1.5cm/ 6.7 * 3.3 * 0.6in Package Weight: 150g/ 5.3oz Packing List: 1 * Writing Tablet 1 * Stylus Pen