Headphone Amplifier Ultra-Compact Stereo Earphone Amplifier Audio Amplifier 4 Channels for Music 6.35MM Jack with Volume Control Feature Ultra-compact stereo headphone amplifier for studio and stage application. With 4 headphone output channels and 1 input channel. The volume of each output channel can be controlled independently. Provides the highest audio quality for each headphone even at maximum volume. Ultra-low noise 4580 operational amplifiers for outstanding audio performance. Comes with a DC 12V power adapter. Specification 100% brand new Voltage: 12V Voice Configuration: 4580 Size: approx. 104 x 57 x 50 mm Color: Silver/Black Package included 1 * Headphone Amplifier 1 * Power Adapter 1 * User Manual Note: 1. We don't offer a retail package, but we will pack it well before shipped out. 2. Please allow 0-1cm error due to manual measurement. plz, make sure you do not mind before you buy. 3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Feature 1: Home Amplifier Feature 2: Ultra-compact stereo headphone amplifier Feature 3: for studio and stage application Feature 4: With 4 headphone output channels and 1 input channel Feature 5: Volume of each output channel can be controlled independently Feature 6: amplificador de audio Feature 7: headphone amplifier Feature 8: amplificador de fone Feature 9: amplificador de som Feature 10: amplificador de fone de ouvido Feature 11: amplificador de auriculares Feature 12: amplificatore audio Feature 13: headphone amp Feature 14: Earphone Amplifier Feature 15: headset Amplifier