Premium RCA Line Level Bass Volume Control for Subwoofer or Amp Car Audio
Small footprint with size at 1.9"(W) x 2.2"(D) x 1.6"(H) or 48mm(W) x 56mm(D) x 41mm(H). Just gently rotate the dial of the Frequency level and Gain level on the front panel to adjusts level of its RCA left and right channel output.