THIS IS A BRAND NEW GROUND LOOP ISOLATOR FOR YOU CAR STEREO .
A low level filter to isolate the ground between the car stereo and amplifier, to prevent car ignition noise and earth-loop hums.
Designed to connect between two pieces of audio equipment that have a ground loop problem ie car headunit and amplifier.
Gold plated connectors
Prevents unwanted hum on an audio system
RCA plug inputs to RCA socket outputs