A beveled, step-down design of the 3.5 mm connector accommodates most mobile devices in a case with a snug and secure connection; Built with heavy duty thick shielding, high-quality polished connectors and corrosion-resistant 3.5 mm connectors; protection against radio frequency interference (RFI) and electromagnetic interference (EMI) Delivers high performance and versatile full range bass for your AV audio device equipment; Accurately transfer high bandwidth frequency quality detailed clean natural pure audio sound / realism and clarity jitter-free in audio signalsBalanced solid conductors for enhanced internal noise rejection and clearer, deeper bass and eliminate strand-interaction distortion; Solid-core bass conductor optimizes low-frequency signal transfer for improved bass responseConnects portable audio device, iPhone iPod iPad, MP3 Music player, Android smartphone tablet or laptop with the common 3.5 mm audio port to a TV, AV receiver, amplifier, projector, radio, car audio, stereo system, Hi Fi audio, computer sound, recording equipment, speaker and moreOxygen Free Copper Lines combined with a double shielding allow for a maximum audio quality; reduce distortion and signal loss; minimizes return loss, so music, dialogue and sound effects are always clear, dramatic, detailed in excellent signal quality