This 4-channel portable headphone amplifier is a must-have for any music lover. With 2 RCA and 1/4" (6.35mm) audio inputs, it can accommodate a variety of devices. The amplifier features 4 channels and 4 audio outputs with 1/4" (6.35mm) TRS connectors, making it suitable for use with multiple headphones. Its amplifier class is A, and it was manufactured in 2017. This headphone amplifier is also portable, making it easy to take with you wherever you go. With its compact design, it is perfect for use at home or on the go. This amplifier is a great addition to any audio setup, providing high-quality sound without compromising on portability.