EX1 Car Stereo Amplifier Gain Level Bass Audio Volume Control Knob with 2 RCA Connector<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>The product is to control the gain level / volume of devices connected to the car stereo， such as speaker， amplifier， bass， etc.</li><li>The controller enables you to adjust the gain level or volume of the device conveniently while driving.</li><li>Simply connect the RCA output connector to the car stereo and the input RCA connector to the device， no additional wires are required.</li><li>Made of high-quality chipset and elegant metal casing， perfect transmission of music signal.</li><li>Length of the product: 27cm</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51Pg57iqszL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41cEJC2tAjL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41AEDGwlR9L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31hJ0MehFBL.jpg" noproxy>