Solid state relay:

noiseless
vibrations insensitive
low coupling capacities between in and output
no mechanical consumption
no disorder due to magnetic fields
no emit of magnetic fields
no error messages in OEM amplifiers or lighting systems
generates the remote signal over the speakersignal of the HU

Note:

connector:  12V power, ground, any 2V - 14,2V voltage

Usecase:

Switching relay 12V
Remote relay 12V

Features:

operating voltage: 7V-12V DC
swiching voltage: 2V-14,4V
max power consumption: <10mA
max output: 1,5A
turn-on delay: 2 Sek.
turn-off delay: <0,1 Sek.
impedance:

usable as switching relay (e.g. picking up rear light signal)
connect to every incoming signal (between 2V -14,4V input voltage)

usable as switching relay (e.g. picking up rear light signal)
connect to every incoming signal (between 2V -14,4V input voltage)