Metra WM-NI12 is an aftermarket antenna adapter that is used to connect an aftermarket antenna to a factory radio harness in select Infiniti and Nissan vehicles from 2007 and newer. It is a high-quality adapter that is easy to install and provides a secure and reliable connection. The WM-NI12 has a male Motorola connector on one end and a Nissan-style antenna connector on the other end. It also has a blue wire that is used to connect to the antenna turn-on lead of the aftermarket radio. To install the WM-NI12, simply connect the male Motorola connector to the aftermarket antenna and the Nissan-style antenna connector to the factory radio harness. Then, connect the blue wire to the antenna turn-on lead of the aftermarket radio. The Metra WM-NI12 is a good choice for anyone who wants to upgrade their factory antenna to an aftermarket antenna in a select Infiniti or Nissan vehicle. It is an easy-to-install adapter that provides a secure and reliable connection. It is an easy-to-install adapter that provides a secure and reliable connection.