Feature:1. Better Effects: When you input dual stereo signals, the audio mixer will output will be the mixed sound with good effects.2. 2 in and 2 Out: Can input or output two different sources at the same time without affecting each other, stable and useful.3. Reliable Using: NJM4580 first phase op amp and NJM4556A second phase driver, able to connect 2 headphones or 2 amplifiers.4. Good Materials: Combining premium ABS and aluminium alloy material to ensures lossless signal and anti interference work.5. Easy to Install: Works stably under DC 5‑19V power supply, and the installation is also very simple, just plug and play.Specification:Item Type: Audio MixerProduct Material: ABS, aluminium alloy. Power Supply: DC5-19V Package List:1 x Audio MixerNote:DC 5‑19v power supply, preferably a linear power supply, otherwise the switching power supply is prone to humming.