Ergonomically designed drivers: Aerospace grade AL alloy drivers give the best acoustics, 3D HD sound and a punchy bass.Passive Noise Cancellation Ear fins for Sport Fit: Ear loop hold your buds in ear stably (colour of the ear loops may vary), perfectly fit for running, climbing, hiking, cycling etc Lightweight , comfortable & premium metallic finish, IPX5 Water resistant Built-in Mic: Condenser microphone for HD calls and Siri/ Google assistant voice command High Fidelity Acoustics: The micro-woofers supply a crystal clear HD sound deliver an incredibly detailed High Definition audio with 3D surround sound.