BMW 3-Series E46 5-Series E39 Handsfree Mute Interface Lead CTTBM001

The mute interface allows you to install both stereos and mono handsfree kits into pre-amplified vehicles. Allowing phone audio from 4 speakers. It also allows stereo audio streaming for handsfree kits that support this feature.

The interface is designed to be plug and play at the back of the original head unit. No additional wiring or cutting of wires is required. A 4 position switch allows you to select any combination of the 4 speakers you wish the handsfree kit audio to be output from. The remote Connection to the amplifier allows you to receive a phone call when the original head unit is turned off. The first ring of the phone call activates the amplifier, allowing you to receive the handsfree kit audio through all 4 speakers.