Sony MDREX155AP Earphones with Microphone for Calling Black In-Ear Headphones/Headset (MDR-EX155AP/B)

Integrated microphone and smartphone playback controls. Product Notes: If the size of the earphone tip does not match the size of your ear canal, or if the headset is not seated correctly in your ear, you may not get the correct sound quality or call performance. Change the earphone tips to ones that fit snugly in your ears. 9mm neodymium driver for dynamic sound. Silicone earphones with a comfortable and secure fit. Flexible 4ft Y-cord. Lightweight design makes it easy to carry. [Inside the box] Cord adjuster, 3 pairs of ear tips (small, medium, large) Connection technology: Wired Frequency response - 5Hz-24,000Hz, impedance - 16 ohms.