Buletooth Wireless Rubberized Hard Shell Slider QWERTY Keyboard Case for iPhone 4 Bluetooth Wireless Slider Qwerty Keyboard Case for iPhone 4. Material: Rubberized Hard Shell Case. Use Wireless Transmission Technology, Campatible for iPhone 4, Easy Snap-on Attachment, Four-Corner Coverage. Durable Hardshell Construction, Form-fitting Shell Designed to Snap-on Securely to Perfectly Fit Your iPhone 4. Cut-out Design for The Touch Screen So That You Can Keep The Same Tactile Feel As Using The iPhone 4 without A Case. Integrated Slide-out Bluetooth Keyboard Allows You to Switch from The Touch Screen to A Physical Keyboard As Desired.