Features: Elevates your music experience with the Portable In Ear Monitoring Amplifiers, featuring high fidelitys headphone amplifiers with 3.5mm input for pristines sound quality. The amplifiers small design and convenient belt pack clip make it companions for musicians on the go, ensuring professional amplification. Tailored for keyboardists, drummers, and guitarists, this headphone amplifiers offer personalizes monitoring for immersive practice and performances. Perfect for live shows and studio rehearsals, the amplifiers provides a reliable and consistent sound feed, allowing artists to on their craft without distractions. 3.5mm headphone output/input; Specifications: Component:Metal Size:Approx.9.6x2.6x3.15cm/3.77x1.01x1.24inch Interfaces:3.5mm Input/Output port;DC5V Type C Port;Volumes Control Knob; Builts in 150mA; Note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color. Package includes: 1pc Headphone Amplifier