brand new and high quality
OOTDTY  

Features:

Just gently rotate the button of the controller. Different frequencies can make the song sound different. It feels very good and is very convenient.
the RCA from the output of this controller to the amplifier, and wire the car stereo output to the RCA input of this unit.
Great for a sub amp volume control.
Used to adjust an amplifier's power level, stereo, or volume form the dashboard or other remote locations.
Adds sub-woofer level controls or balances a multiple amplifier installation.
Compact housing allows the unit to be mounted virtually anywhere so control is at the user's fingertips.
Fine tunes the volume of any RCA line level you to control.
Simple in and out no additional wiring needed.
the RCA from the output of this Controller to the amplifier, and wire the car stereo output to the RCA input of this unit.

Specification:
4 RCA: 2 RCA input & 2 RCA output
Level control knob
Frequency
Volume
Material: Metal
Dimensions: 48x56x41mm/1.89x2.2x1.61inch
Color: Black
Quantity: 1 Pc
Note:
1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Package Includes:

1 Car Regulator