Channel Stereo Headphone Amplifier. Immerse yourself in superior sound quality and enjoy high-power stereo with volume control for each channel.Our amplifier features 4 ports 3.5mm output and 1 port 3.5mm input, making it compatible with 3.5mm headphones. Anti-crosstalk: This ultra-low-noise amplifier system is designed to provide anti-crosstalk, allowing for a seamless distribution of up to 4 audio signals or headphones. Experience crystal-clear sound performance in both studio and stage applications. level control: Each channel of our headphone amplifier comes with level control, offering high fidelity analog circuitry, high power output, dynamic sound, and low distortion. Enjoy personalized volume control and eliminate interference noise. Safety and stability are : Our amplifier is powered by a 5V AC adapter and features high quality aluminum housing that ensures both safety and sound quality. Material: aluminum colour: black Package Contents: 1 x Headphone Amplifier 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.