The Otter Box Commuter Series case for the Black Berry Curve 8900 series offers the best of both worlds; incorporating elements from the rugged Defender Series line with the silicone, skin-like Impact Series line to create a slick case designed with your style in mind. Its protection without the bulk. The exposed silicone corners dissipate impact away from the device for additional bump & shock protection & the smooth outer layer allows the case to easily slide into your pocket or purse. All buttons are fully functional through the case & the audio jack & USB (Universal Serial Bus) port are accessible through silicone plugs.