Xmsjsiy Universal Rca Level Controller Car Audio Amplifier Volume Control Knob Product Details The rca amplifier is to control the gain level / volume of devices connected to the car stereo, such as speaker, amplifier, bass, etc. It is manufactured with premium material for durable and long lasting use. Excellent workmanship ensures its high practicability. Strict quality inspectation system insures you premium product and safe usage. Great and helpful accessory for your car. Remote bass level control turning knob, great accessory for car and home subwoofers, work well for your spl amp/ppl amp, balance desktop speaker system, great for stereo that does not have a bass tuner. It is easy to install. Two rca inner hole inputs and two rca inner hole outputs are installed in or under the instrument panel. You can quickly adjust the volume of the on-board amplifier without additional wiring. Simple in and out connections,no additional wiring needed.Mini size easy to installation by DIY without manuals. Package Include: 1*car audio amplifier 2* mounting screws The car rca audio amplifier is control the gain level / volume of devices connected to the car stereo,such as speaker, amplifier, bass,etc.Dash mount amplifier level control for volume adjustment.Dash mount rca amplifier level control is used to adjust amplifier gain, power level, stereo, equalizer or crossover volume when you driving The universal rca level controller for car is made from high quality materials and metal for optimal signal transfer this amplifier controller offers high-quality signal transmission with rca composite cables.Adds subwoof level control to any head unit. Perfect for balancing the system to change music styles RCA level controller perfect for balancing the system to change music styles, control your sub-woofer output, you can set the subwoofer on maximum gain and then vary the knob to taste as per genre or media good fit for car, motorcycle, speakers, home.Stereo rca input and output. Connect the rca output connector to the car stereo and the input rca connector to the device, no additional wires are required. With especially good fit for car, motorcycle, speakers, home This amplifier controller made of high-quality chipset and elegant metal casing, perfect transmission of music signal. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.