Experience high-quality audio with the Sony MDR-XB55AP In-Ear Stereo Headphones. These headphones come with 12mm drivers that deliver powerful and clear sound, along with the Extra Bass feature that provides deep and punchy bass. The headphones have a wired 3.5mm jack connectivity and are designed in an in-ear form factor for a comfortable and snug fit. These blue-colored headphones are brand new and have never been used before. They come with a built-in microphone, which is perfect for taking calls and voice chats. The unit quantity is 4 and the impedance is 16 ohms. The Sony MDR-XB55AP In-Ear Stereo Headphones are a great addition to your audio collection and are perfect for music lovers who are always on the go.