Universal Car Audio Amplifier Bass RCA Level Remote Volume Control Knob LC-1 Newbrand new and high qualityMaterial: PlasticColor: BlackColor: BlackSpecification:Model: LC-1Interface:2*RCA Output2*RCA InputTotal Length: 27.5cm（Approx）The distance between the mounting holes: 4.4cm(Approx) 　Fitment:Suitable for most of the car. 　Features:4 gold plated RCA'sMount in or under the dashDash Mount Amplifier Level Control for Volume AdjustmentCan Adjust the Amplifier Gain While DrivingPerfect for Balancing the System to Change Music StylesSimple in and out connections, no additional wiring neededMade from high quality materials and metal for optimal signal transferComes with Mounting BracketQuantity:1 setNote:Due to the difference between different monitors, the picture may not reflect  the actual color of the item. Thank you!