BlackBerry Noise-Isolating Stereo Headset (Black, Bulk Packaged) Compatible with the BlackBerry 8100, 8800, 8820, 8830 Noise Isolating Stereo Headset designed to work for i Pod and iPhone, as well as any MP3 music player or mobile phone including BlackBerry devices with a standard 2.5 mm stereo headphone jack. Enhanced bass performance In-ear design providing noise isolation