Helium Digital has introduced its latest accessories for the iPod, iPad, and iPhone 4. The Carbon Fiber Defense Shield is a new film set for the iPhone 4, precision cut from carbon fiber, and including film pieces to protect the front, rear, and sides of the device. It is available now and sells for $15. The new SwitchPlates case for the iPhone 4 is a snap-on style case, featuring a unique changeable color plate system that allows users to swap out the rear cover for a one of another hue. Features include open access to all ports and controls and three included color plates; the SwitchPlates case for iPhone 4 is also available now and sells for $20. Finally, the HD-500 Multi-Dock Charging Station is a table-top charging cradle offering the ability to charge a connected iPod, iPhone, or iPad, and the ability to act as a simple cradle for passive portrait or landscape viewing. The HD-500 will sell for $25 and is expected to ship in February.