Features Better Effects: When you input dual stereo signals, the audio mixer will output will be the mixed sound with good effects. 2 in and 2 Out: The audio mixer can input or output two different sources at the same time without affecting each other, stable and useful. Reliable Using: NJM4580 first phase op amp and NJM4556A second phase driver, able to connect 2 headphones or 2 amplifiers. Good Materials: The audio mixer stereo distributor combined premium ABS and aluminium alloy material to ensures lossless signal and anti interference work. Easy to Install: The 2 in 2 out converter switch box works stably under DC 5‑19V power supply, and the installation is also very simple, just plug and play. Specification: Item Type: Audio Mixer Product Material: ABS, aluminium alloy Power Supply: DC5-19V Package List: 1 x Audio Mixer Note: DC 5‑19v power supply, preferably a linear power supply, otherwise the switching power supply is prone to humming. Package List 1 x Audio Mixer