It is a portable headset amplifier with a modern appearance, high -power output and excellent voice output quality. Five buttons ensure easily control; 1/4in and 1/8in output, 1/4in, 1/8in TRS and RCA input to meet the needs of the use, which can be connected to 3.5mm audio equipment such as computers and mobile phones to improve sound quality. Modern and mini design, lightweight and portable, easy to carry stereo headphones amplifiers with you, easy to carry, can be used anytime, anywhere. The headset amplifier is made of iron alloys and is solid and durable. It provides independent amplification and volume control for up to four headphones. The perfect circuit design ensures good sound quality and stable performance. Independent volume control allows each listener to determine its own volume through a dedicated output volume control knob. This is a personal ear -listening headset amplifier that can be used on the stage or recording room, providing flexible and convenient personal monitoring solutions for artists and recording artists. feature: Durable material: The headset amplifier is made of metal shell, which is sturdy and durable. The bottom is used to ensure stability. POWER key-opening/level, AV MUTE key-connecting or cutting off the RCA input signal, 6.35 MUTE key-connecting or cutting off 6.35mm input signal, 3.5 Mute key-connecting or cutting 3.5mm input signal