Headunit Ready Plug and Play T Harness with Chime Speaker for GM & Holden Vehicles. Greatly simplifies the installation of an AUS-MRR & AUS-MRR2 (Sold Separately) when installing a Maestro Compatible Radio. 

The radio side of the T Harness terminates in a universal connector that can be used with an available Maestro Headunit Adapter Cable (sold separately). Remember to order the correct adapter for the headunit you are installing.