General Spec Color black Pattern single pentagram   Material plastic Function non-slip, anti-scratch, dustproof and shockproof Compatibility iPhone 4G Others 1*Lithium battery Features Fit the contour of iPhone 4G precisely. Not only flash while calling or called, but also help strength the signal. Keep your iPhone scratch-free, protect it not to break, beautify and personalize it. Ultra slim and custom-fit with open-face design for easy operation. Easy access to all buttons, controls and ports without removing the case. Simple to install and easy to remove.