Features: 1.This mini passive stereo mixer is a stereo 4-way passive mixer, useful and practical 2.Used for extended control of mixers, CD players, tape players, computers, mobile phones, tablets, etc. No battery or other power source required 3.The device can also be used as a 1-in-4-out stereo splitter, turn CW to adjust the volume 4.Audio signal effect equipment can be used to connect mixer output or other output devices 5.Possess 4 stereo RCA inputs and 1 stereo RCA output, 4 independently adjustable 100k ohm potentiometers specification:Item Type: Stereo Mixer Material: Metal Colour: Black Interface: 6.35mm In1-4: Control the signal level of input 1-4 Input Impedance: 10K ohm to 47K ohm Output Impedance: 2.5K ohm to 10K ohm Gain: -12dB maximum PackageList: 1 x Stereo Mixer 1 x User Manual NoteWhen connecting the power source, please make sure that you are using the correct power source voltage of the specific model before plugging the device into the power outlet. The faulty fuse must be replaced with a fuse of the same type and rating without exception.