Mini Stereo 4 Channel Line Mixer Low Noise Professional 4 Channel Passive Mixer for Mixing Instrument CD Player Feature: 1. With 4 stereo RCA inputs and 1 stereo RCA output. 2. Used to connect RCA jacks to the mixer outputs or other output devices. 3. C ontrols the signal level from inputs 1& 8209;4. It has stable performance and sensitive signal. 4. Used for extended control of mixing, mixing instruments, CD players, tape players, computers, mobile phones, tablets, etc. 5. Requires no batteries or other power source. The unit can also be used as a 1 In 4 Out stereo splitter with clockwise volume adjustment. Specification: Item Type: 4 Channel Passive Mixer Material: ABS Colour: Black Range of Application: Mixing Instruments, CD Players, Tape Players, Computers, Mobile Phones, Tablets, Etc. Input Impedance: 10K Ohms to 47K Ohms Output Impedance: 2.5K Ohms to 10K Ohms Gain: -12dB Maximum Package List: 1 x 4 Channel Passive Mixer 1 x Manual