<p>[ Stereo Audio Mixer ] 4-Channel Audio Mixer Can Mix 4 Stereo Audio Signals Can Mix Mixing Instrument, CD Player, Tape Player, Computer, Mobile Phone, Tablet Audio Signals to Speaker and Headphone.</p> <p>[ RCA Input and Output ] With 4-Channel RCA (L\u0026R) Input and 1-Channel RCA (L\u0026R) Output, Convenient to Use.</p> <p>[ 4 Separate Volume Controls ] Each Channel Has an Volume Control, Adjust the Volume as You Needed.</p> <p>[ No Need Power Supply ] No Power Supply Requirement. Plug and Play, Metal Housing, Durable and Sturdy.</p> <p>[ Ultra Low Noise ] Better Sound Quality Even at Maximum Output Levels, Provide an Excellent Audio Performance.</p> <p>Specification:</p> <p>Input impedance: 10K ohms to 47K ohms</p> <p>Output impedance: 2.5K ohms to 10K ohms</p> <p>Gain: -12dB MAX</p> <p>Product net weight: 0.2 kg</p> <p>Product size: 85 mm X 52 mm X 40 mm</p> <p>Colour:black</p> <p>Material:Metal</p> <p>Size:8.5 x 5.2 x 4cm</p> <p>Package Contents:</p> <p>1 * Stereo Audio Mixer</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>