The case still splits in two, with a slide-off portion at the bottom serving as the opening for inserting and removing the device. Of course this also allows the iPhone 4 to fit into most docks and docking systems, but even with the bottom portion on, the iPhone 4 will fit into Universal Docks. Instead of a totally plastic body, Pro Slider Case has hard rubber along the edges to provide some shock absorbency. On the other hand, the rubber is really…