Specification: Item Type: 10 Channel Headphone Amplifier Model: AU HP10 Material: Aluminum Alloy Driver Chip: NJM4556A Quiescent Current: 85mA Gain: 12db Output Impedance: 16-600 ohms Input Impedance: 10K Input and Output Jack: 3.5mm Working Power Supply: DC12V 1.5A power supply **Note: The power adapter and audio cables need to be purchased separately. This is the Amp Only Features & details SWITCH AND OUTPUT: Designed with power switch and 3.5MM headphone output, which can power to 10 pairs of headphones and up to 10 independent volumes, ideal for meetings. ALUMINUM ALLOY: Using aluminum alloy material, which has light weight, good heat dissipation and less interference, resistance and wear resistance, has a long service life. APPLICABLE SCENES: Adopt DC12V 1.5A power supply, convenient and stable in connection, widely used in studios, stages, recording studios and conference recording situation, etc. SOUND AMPLIFIER: 10 channel stereo headphone amplifier, output control per channel, compatible with 3.5MM and 6.35MM headphone (3.5MM to 6.35MM adapter required). APPLICABLE SCENES: Adopt DC12V 1.5A power supply, convenient and stable in connection, widely used in studios, stages, recording studios and conference recording situation, etc.