The 2.0 stereo two audio inputs are mixed into one stereo output, which can directly drive headphones or power amplifiers, 3.5mm headphone socket, and the potentiometer controls each volume independently without affecting each other. The power supply is DC 5V-12V, and the magnification is about 2 times. The static current is about 15ma, and the maximum driving current is 70ma, which can easily drive a of headphones and external amplifiers. Colour:Transparent Material:ABS Package Contents: 1x Audio signal mixing board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.