Manufacturer: Logitech. Ultimate Ears custom earphones are used by 80% of the world's touring professional artists for live performances. Fit, form and frequency - SuperFi 5 earphones. The unique top-fire armature design provides flexibility that fits into your day. The High-fidelity sound signature and unique top-fire armature design ensures a snug, noise-isolation fit every time with extended high-frequency response and a full soundstage. These earphones fit well for exercising. They have a flexible use, you can wear them down for casual listening or over the ear while exercising or when more active. The three different-sized silicone ear-cushions and two sets of Comply™ foam ear cushions are included to find a "magic seal" against outside noise (-26 dBs) in your ears. These earphones are compatibility with iPod® and MP3 players with a standard 3.5 mm jack, and laptops. The sleek, precision-crafted top-fire armature provides a snug fit for an immersive experience, flexible design to adapt to your situation and produces more extended high frequency response and a full soundstage.