MP-320 Professional In-Ear Monitors build on that legacy with incredible sound and build quality for both artists and personal listening. Featuring a triple dynamic driver design for a surprising level of musical separation and nuance with plenty of low-frequency response. And thanks to their specially molded enclosures, they sit gracefully in your ear with a comfortable, ergonomic fit with up to 40db of sound isolation. The optional MP-BTA Bluetooth Adapter makes on-the-go listening a breeze. Elevate your performance and music with Mackie MP-320 Professional In-Ear Monitors.