Yellow Calls/Music In-ear Headset Wireless Bluetooth Intraaural Microphone type: Built-in Built-in battery Lithium-Ion (Li-Ion) Designed for comfortBeats Fit Pro is equipped with comfortable, secure-fit wingtips that flex to fit your ear. The universal wingtip design was put to the ultimate test by athletes of all kinds so you can trust these earbuds will stay put through work days and workouts. Complete with pressure-relieving vents, you can comfortably wear these earbuds all day long.Three soft silicone ear tip options make it easy to find the right size. The Fit Test1 setup for both Apple and Android helps ensure proper fit for a customised acoustic seal and optimal performance.Surrounds you in soundBeats Fit Pro is engineered to deliver powerful, balanced sound via a custom acoustic platform that stays with you through your daily activities. A proprietary, dual-element diaphragm driver resides within a two-chamber housing, resulting in clear sound with outstanding stereo separation