Stereo bass sound and noise isolating : Ant audio Thump 504 is brilliantly engineered with high quality dynamic drivers that pump out powerful deep bass and balanced crisp highs, creates an exciting and fun listening experience. Advanced driver casings are designed and made with solid sound-insulating material, reducing external noise while minimizing sound leakage. You can enjoy the real life of the music. Aluminium alloy housing - Ant Audio Thump 504 has a full aluminium alloy housing which is forged by over 20 processes that is more corrosion-resistant, anti-aging and more durable than traditional metal headphones, oxygen-free copper wiring blocks interference for better-sounding audio. The compact light weight design make it the perfect choice when exercising, traveling, or enjoying music during your daily.