Check the listing for details. Audio RCA Inline Signal Line Level Amp Remote Volume Controller Gain Knob. Condition: New. Listed at 6.59 USD. Audio RCA Inline Signal Line Level Amp Remote Volume Controller Gain Knob Specification: Color: Black; Condition: 100% Brand New and High Quality!!! Model: LC-1; Interface: 2*RCA Output, 2*RCA Input Total Length: 27.5cm（Approx） The distance between the mounting holes: 4.4cm(Approx) Quantity: 1 pc; Suitable for most of the car. 4 gold plated RCA's Mount in or under the dash Dash Mount Amplifier Level Control for Volume Adjustment Can Adjust the Amplifier Gain While Driving Perfect for Balancing the System to Change Music Styles Simple in and out connections, no additional wiring needed Made from high quality materials and metal for optimal signal transfer Comes with Mounting Bracket Package Included: 1 x Audio Controller 2 x Mounting screws Note: Light shooting 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 +/-1-3 cm. Kindly Note: If you need a huge quantity, contact us to get more competitive offer. Shipping and Payment: Payment : Paypal Shipped within 1 business days once payment done. Ship via USPS 1st class mail with Tracking Number,2-5 days to reach you. Refund and Guarantee: 30 Days Money Back Guarantee 180 Days - Free Exchange Please contact us with any questions or concerns,we will solve it until you satisfy.