Features: brand new and high quality Elastic fit button, comfortable for touch of silicone button, beautiful design and the silica gel buttons are wear-resistant and with long service life. Mute button design, quiet study without interference, for students attending classes, large screen. With 4.0 inch pull-out handwriting tablet LCD screen is dust-proof and ink-free. Safety and hygiene.Use natural light to present handwriting,write without hurting eyes. Clear the screen with one button and write repeatedly. for Tough solid thickened ABS and silicone material,durable and easy to use. Specifications: Size: Approx 122x92x15mm/4.8X3.6x0.6in Color: Black/Gray/White Weight:136g Material: ABS Applicable Battery Type: Solar Power and Battery Dual Power Application: Number|Desktop|Laptop|Tablet Keyboard Standard: 12-degit Feature: with 4.0 inch Pull-out Handwriting Tablet Note: Transition: 1cm=10mm=0.39inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. for Wish you a pleasant shopping experience! Package includes: 1 x Calculator