Noise Isolating Compact In-Ear Headphones with Universal Remote & Microphone. For those seeking a compact in-ear headphone that doesn't sacrifice sound or build quality, the aluminium RHA S500 Universal delivers exciting, immersive audio in addition to unparalleled comfort for any size of ear. Micro dynamic driver (model 140.1) for vibrant, full-range sound. Ultra-compact, comfortable design. Lightweight, durable, aluminium construction. Universal remote and microphone allows you to control music playback and take calls across all device types. Color: Black.