QUAD-DRIVER HYBRID IEM: The flagship of the MEE Professional MX PRO in-ear monitor series, the MX4 PRO utilizes a four-driver hybrid setup with a 10mm dynamic subwoofer and three balanced armatures to deliver linear bass, exceptional clarity, and crisp detail; with balanced sound tuning and quad-driver resolution, the MX4 PRO delivers the ultimate high-fidelity reference sound for stage and studio OPTIONAL CUSTOMIZATION: Convert your MX4 PRO into a custom monitor any time by ordering MEE Professional custom-fit eartips, 3D-printed to the exact size and shape of your ears for a perfect fit and improved noise isolation; then, personalize your earphones with engraved metal faceplates — choose from existing artwork options or use your own design MODULAR DESIGN WITH DETACHABLE CABLES: Built to last with a sweat-resistant construction and two detachable, replaceable cables included in the box; unique modular design means that all parts, customizations and accessories are interchangeable between all of the MX PRO-series models (MX1 PRO, MX2 PRO, MX3 PRO, and MX4 PRO) SUPERIOR FIT & COMFORT: Ergonomic design with flexible memory wire earhooks that conform perfectly to your ears delivers a secure, personalized fit that stays comfortable all day and ensures that your monitors never fall out COMPLETE KIT: Includes standard audio-only cable and spare headset cable with built-in microphone and remote for smartphones and tablets, carrying case, Comply memory foam eartips, silicone eartips (4 pairs), shirt clips (2 pairs), ¼" (6.3mm) adapter, and user manual