High-quality connection assured: The ER Series Headset Adapter features a Male for Etymotic Series to MMCX Female design, facilitating effortless connections to MMCX cables. This adapter is perfect for users of for Etymotic ER4, ER4SR, ER4XR, ER3XR, ER3SE, ER2XR, and ER2SE headsets, ensuring a stable and high-quality link to compatible devices. Seamless audio integration: Designed to enhance the audio experience for Etymotic Series Headset users, this adapter combines durable construction with reliable performance. It guarantees superior sound mission, allowing you to enjoy flawless audio whether for professional monitoring or personal enjoyment. Optimal compatibility and versatility: Tailored specifically for Etymotic Series Headsets, this adapter maximizes compatibility, making it an essential accessory for various audio applications. It's the perfect choice for professionals and audiophiles seeking to expand the utility of their high-quality headsets. Secure and consistent performance: Featuring a MMCX Female connector, this adapter ensures a secure attachment to MMCX cables, minimizing signal loss or interruptions. Enjoy a consistent and uninterrupted audio experience, whether you're in the studio or on the move. Compact and stylish design: This pair of adapters is not only functional but also aesthetically pleasing with its sleek black finish. Lightweight and portable, it's designed for easy port and use wherever you go, making it an indispensable accessory for any for Etymotic headset owner. Color: A: parent/B:Black Material: plastic+metal Package Contents: 1 pair * adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.