Features: [Multifunctional connection]: Use our headphone amplifier with XLR stereo input and 3.5mm output to experience excellent sound quality. XLR input connection ensures safe and reliable connection and prevents cable from being accidentally disconnected. Simply press the release button to easily disconnect the cable. [Customizable Volume Control]: Enjoy a listening experience with our headphone amplifier that provides individual volume adjustment. Customize the monitoring volume according to your preference for the best listening experience. Portable and convenient: Our compact and portable earphone amplifier is designed for easy use. Its compact shape is easy to carry in your pocket or easily hang around your neck with the attached lanyard. Perfect for busy professionals and music lovers. Plug and Play: No need for external power supply! Our headphone amplifier is completely self-powered, allowing you to connect and use it immediately. The fashionable metal body not only adds a touch of elegance, but also improves the overall sound quality, providing rich immersive audio. [Professional Audio Output]: Our headphone amplifier is specially designed for in-ear monitoring system, which can provide clear sound reproduction. Immerse yourself in clearer and more accurate music, so that every listening becomes a truly immersive experience. Specifications: Receiving method: in-ear type Input type: XLR, stereo Output type: 3.5mm TRS, stereo Color: Black Material: Aluminum alloy Note: The printing batches are different, the words may be different, but it does not affect the use Package Contents: 3 x Headphone Amplifier