Premium Stereo Sound: Dynamic speaker system and a wide frequency response(20hz-20000hz), together with high levels of noise isolation, enables every details more closer to original sound. Ergonomic Comfort-Fit: Innovative ergonomically shaped ear hooks are designed to fit the shape of your ear, four sets of interchangeable ear tips ensure it fits in all ear sizes, staying in place securely without discomfort even after a long time use, you will never have the hassle about it falling out of your ears. Strong Compatibility: Compatible with all 3.5mm headphones port devices, such as most Smartphones, iPhones, iPads, iPods, MP3 player, Laptop, Tablets and so on. Oxygen-free copper 3.5mm stereo audio cable provides maximum conductivity and ensures high fidelity sound quality.