Features: 

l 100% Brand new and high quality

l Made of high quality materials, durable and wear-resistant

l Solid and durable, long service life

l Easy to install and remove

l Universal car amplifier/speaker bass controller, regulator

l Two ways to adjust, 1 through the gain adjustment, 2 through the frequency adjustment

l Just gently rotate the controller's button, different frequencies can make the song songs sound different Oh, feel quite good, but also very convenient!

Specification:  

l Material: copper core

l Weight: 55g     

l Color: Black

l Quantity: 1 PCS

Package:

l 1x Amplifier Volume Adjuster