Feature:1. Stereo Mixer: This mini passive mixer can easily extend, control and mix the stereo into the effect you preferred.2. 4 Channels: Comes with 4 stereo RCA inputs and 1 stereo RCA output, can work as a 1in 4 out stereo distributor.3. Wide Application: Enables flexible application on CD player, tape player, computer, cell phone, tablet and so on.4. Simple Operation: Adjustment is very simple with clockwise rotation, and no battery or power supply is required.5. Easy Carrying: The stereo mixer has a light weight and a small size, and both storage and carrying are very easy.Specification:Item Type: Stereo MixerMaterial: IronColour: BlackInput and Output: 4 stereo RCA inputs and 1 stereo RCA output. Potentiometer: 4 independently adjustable 100k ohm potentiometers. Input Impedance: 10K ohm to 47K ohm. Output impedance: 2.5k ohm to 10K ohm. Gain: -12 dB maximum. .Package List:1 x Stereo Mixer1 x User Manual