The all new SmartCase 4™ for iPhone 4 is both iconic and legendary in design and performance, with features that are second to none in the market today. Fully understandable since it embodies much of what has been learned through 3 generation of iPhone case design. This case is stronger, more compact, and packed with features unlike any other iPhone case in its class. The SmartCase™ for iPhone is based on our award winning Quattro 4™ iPhone case. We took what was great and made it better to fit the new iPhone 4. The iPhone 4 embodies the notion of what IvySkin stands for; thoughtful designs that make no compromises when it comes to protection. Features: Complete Coverage The SmartCase's premium quality PolyCarbonate perfectly encapsulates the iPhone 4, and delivers complete coverage against impact, shock, dirt, dust, and scratches. Screen Protection The authentic Glass Touch-Thru™ screen protects, guards, and maintains the iPhone’s screen through two layers. The glass screen is embedded into the case so in case of a fall, the iPhone's fragile screen is fully protected. UltraHybird We believe the only way to have a full hybrid battery case is by having the option to remove the battery pack when needed. With our Quattro 4™ base-frame hard protection system, you now have the option to remove the battery pack and slide in the thin back piece for a super slim case. Unlike most of our competitors, we have devised a design in which you only install the battery pack when needed. When the battery pack is not in use/being charged, you'll be able to install the original slim back piece to fully protect your iPhone 4. SureGrip™ The SmartCase 4™ exterior features a smooth silky anti dust micro-texture that helps the iPhone from sliding in your hands. Plus, the sides feature our patent pending SureGrip™ design which makes holding the iPhone 4 easier and more comfortable. Smart battery The SmartCase 4™ features a embedded smart battery to virtually double the time you have to watch, read, Surf and Send with the iPhone 4. Charge and Sync Charge and sync the iPhone to iTunes™ without removing it from the SmartCase™ by using the included USB cable. Performance Testing The SmartCase 4™ is specially designed for iPhone 4 and has passed strict over-the-air performance tests conducted by an Apple™ designated test lab. Status Indicator The integrated LED status indicator tells you exactly how much juice is left at the push of a button. It also indicates the charging status so you know before you go. On/off switch The integrated On/Off switch enables you to use the SmartCase’s power house only when is needed. Slide the switch to on position to have an instant access to a 1500mAh of power and turn it off to save its energy for much needed time.