4-in-1-out Passive Mixer Module Mini Stereo 4-Channel Passive Mixer Audio Mixer 4 Audio Input to 1 Output Ultra Compact Low Noise for Recording Studio Console Stage Small Club or Bar Features: The passive mixer module is sent in assembled. Four channels, each with an independent volume adjustment button. No battery or other power source required, easy e. Small and compact size, easy to carry. Superior sound quality with ultra-low noise. components and strong structure. Specifications: Type: 4-in-1-out / 1-in-4-out (Optional) Material: PVC+copper Input Impedance: 10K ohms~47K ohms Output Impedance: 2.5K ohms~10K ohms Gain: -12dB MAX Item Size: 85 * 55 * 26mm / 3.35 * 2.17 * 1.02in Item Weight: 106g / 3.75oz Package Weight: 169g / 5.98oz Package Size: 14.8 * 9 * 7.5cm / 5.83 * 3.54 * 2.95in Packing List: 1 * Mixer 1 * Manual (English)