The pink gold 1MORE Piston Fit In-Ear Headphones were tuned in collaboration with Grammy-winning sound engineer Luca Bignardi to deliver a natural sonic signature free of tonal harshness. The dynamic drivers utilize dual-layer diaphragms and aluminum sound chambers to produce a 20 Hz to 20 kHz frequency range with a clear and powerful output. With oblique-angled ear fittings and three pairs of silicone eartips, these in-ear headphones are designed to offer a comfortable, stable fit and passive noise isolation. The copper-wrapped Kevlar core cable provides enhanced durability while remaining pliable. Its gold-plated 3.5mm TRRS mini plug is compatible with a variety of smartphones, tablets, computers, and portable media players.