New Otterbox Iphone 3 Case Defender Trade Series Holster Apple 3g Yellow Black Membrane Covers Iphone 3 Case OtterBox OTTR194205 (1942-05.5_S) DEFENDER Series Case/Holster Apple&reg; iPhone 3G/3GS - Yellow/Black. For consumers that demand the highest grade of protection for their precious device, look no further than the DEFENDER Series by OtterBox. The DEFENDER case for iPhone 3G/3GS offers stylish and sophisticated protection in 3 layers. First, a thin, clear membrane covers your Touch Screen to help prevent scratches and dings. Second is a hard, strong Polycarbonate skeleton that surrounds your device.