The calculator has elastic and soft buttons, allowing for comfortable using experience. Adopting dual power supply modes, the product has longer standby time. The product can serve as calculator as well as writing tablet, which is multifunctional and practical. The lock button can prevent accidental deletion. Made of silicone and ABS material, the calculator writing tablet is lightweight, eco-friendly and durable to use. The length of the calculator writing tablet is 16.1cm, width is 7.8cm and thickness is 1.4cm. It is ultra-thin and foldable, which is convenient to carry it with you. The calculator writing tablet is suitable for study, doddle and so on. Item Name: Calculator Digital Writing Tablet Material: Silicone,ABS Color: Black Screen: 6 Inch High-definition LCD Screen Power Supply: Solar Energy, Button Battery Battery: 1 x 1220 Button Battery(Included) Features: Multifunctional, Foldable, Ultra-thin Size Details: 16.1cm x 7.8cm x 1.4cm/6.34" x 3.07" x 0.55" (Approx.) Notes: Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Please allow slight dimension difference due to the manual measurement. Package Includes: 1 x Calculator Digital Writing Tablet 1 x User Manual