The AudioControl ACR-1 is a remote level control knob designed for use with various AudioControl LC6i, LC7i, Overdrive Plus, Matrix, and Epicenter signal processors. Made in the United States, this knob allows for convenient adjustment of audio levels within a vehicle, providing users with a sleek and reliable option for controlling their car audio system from the driver's seat. With its compatibility with multiple AudioControl models, the ACR-1 offers flexibility in setting up and tuning audio levels for personalized listening experiences on the go.