Special relay to mute audio when reversing to allow parking tones to be heard clearly.

This relay is designed for aftermarket radio fittings where a parking sensor retention interface has been fitted.
This relay will use a positive reverse gear signal to mute the new head unit, so when the car is reversing the radio is silent and the parking tone interface can be heard clearly.

Microphone for use with handsfree kits and after market head units with a 3.5mm jack mic connector