Feature:1. [Extended Control]: The 4 channel line mixer is designed to extend the sound control capabilities of tuning, mixing instruments, playback devices, and electronic devices.2. [No Power Needed]: The stereo line mixer does not need batteries or external power sources, ensuring convenience and practicality, can simply connect and start mixing right away.3. [Versatile Functionality]: Not only can the line mixer be used as a stereo mixer, but can also function as a four channel stereo distributor, allows for various applications, catering to your unique sound needs.4. [Easy Connection]: Equipped with output RCA jacks, the line mixer provides easy connectivity options to connect your mixer with other devices seamlessly, ensuring stable and reliable connections.5. [Precise Volume Adjustment]: Featuring four independent 100K ohm potentiometers, the line mixer allows for precise control over signal levels, enhancing your overall sound experience.Specification:Item Type: Passive MixerMaterial: IronSize: Approx. 83 x 52 x 38mm or 3.3 x 2 x 1.5inInput Impedance: 10K Ohms to 47K OhmsOutput Impedance: 2.5K Ohms to 10K OhmsGain: - 12dB Maximumax.Package List:1 x Passive Mixer1 x User Manual