When changing the factory stereo in VW and Audi cars this aerial booster is required to power the internal aerial amplifier to improve the radio reception.
This plug adapts the Euro vehicle aerial plug to a standard aerial fitting and boosts the radio signal for the best radio reception.
JVC to ISO wiring plug. 
USA American Band expander to NZ 
Suzuki wiring plug adaptor. 
Toyota side trims with AUX & USB extensions. 
Toyota aerial plug adaptor. 
