Dynamic HiFi Headphone provides stunning bass sound & superior comfort! Equipped with optimized 40mm dual layer film speaker to offer clear, crisp performance. Fully compatible with applications such as making calls, Skype, Messenger and other online conversation programs. It"s a version with Gold-plated plug specially for the Apple iPhones, allowing users to switch back and forth between listening to music and calls?at the touch of a button on the Mic.