1 Male to 2 Females Antenna Adaptor Cable.
It can choose the best radio signal between the two vehicle mounted antennas.
An Aerial Adaptor is needed when replacing the original factory fitted head unit with an aftermarket head unit.
This aerial adapter can convert your standard aerial connection so you can connect an aftermarket car stereo.
What you get: 1 x 1 Male to 2 Females Diversity Antenna Adaptor.