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

Integrated microphone and smartphone playback controls. Product Notice: If the earphone tip size does not match the size of your ear canal or the headset is not seated properly in your ear, you may experience poor sound quality and call performance. Please change the earphone tips to ones that fit snugly in your ears. 9mm neodymium drivers deliver dynamic sound. Comfortable, secure-fit silicone earbuds. Flexible 4-foot Y-cord. Lightweight design makes it easy to carry. [In the box] Cord adjuster, 3 pairs of ear tips (small, medium, large) Connection technology: Wired Frequency response - 5Hz-24,000Hz, Impedance - 16 ohms.