HA400 Ultra-Compact 4 Output 1 Input 4 Channels Audio Stereo Headphone Amp Amplifier with EU Power Adapter for Studio Recording Feature: 4-channel stereo headphone amplifier for all types of headphones. Ultra-compact stereo headphone amplifier for studio and stage applications. Has 4 headphone output channels and 1 input channel. The volume of each output channel can be controlled independently. Provides the highest possible audio quality for each earphone, even at maximum volume. Ultra low noise 4580 op amp for outstanding audio performance. A DC 12V EU power adapter is included. Specification: Type: Mini Headphone Amplifier Model: HA400 Color: black, silver, black white (optional) Material: metal Input Type: LINE IN (AUDIO IN) Output type: LINE OUT (AUDIO OUT) Built-in battery: none Recommended maximum impedance for headphones: 65-80 ohms Bluetooth-compatible: none WIFI: none Power adapter: EU plug Plug type: EU plug, suitable for Indonesia, Germany, France, Spain, Italy, etc. Analog Input: 1 x Stereo Analog output: 4 x TRS Channel Control: Volume Dimensions: 104x57x50mm/4.09x2.24x1.97in Product weight: 0.2 kg Use in combination: You can use this ultra-compact stereo headphone amplifier with any of 4 headphones at the same time. Four listeners in the studio can listen to the main mix while recording, and each listener can adjust their own volume using a dedicated output level control. The HA400 contains 4 high-power stereo amplifiers to maintain the highest sound quality at maximum volume. The ultra-low noise 4580 op amps offer outstanding audio performance, they are the same op amps found on full-size audio equipment, and a DC 12 volt adapter is also available. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.

1x headphone amplifier 1x EU adapter