The product 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.
The controller enables you to adjust the gain level or volume of the device conveniently while driving.
Adds subwoof level control to any head unit. Perfect for balancing the system to change music styles.
Simply connect the RCA output connector to the car stereo and the input RCA connector to the device, no additional wires are required. With RCA composite cables,this amplifier controller offers high-quality signal transmission.
Made from high quality materials and metal for optimal signal transfer. Mini size easy to installation by DIY without manual, especially good fit for Car, Motorcycle, Speakers, Home.