You can just Insert this item to the back radio then Connect the red wire to 12V, the black wire to 12V-.
Just plug the connector into the socket back of your radio
Match your phone or pad to bluetooth module. And Choose Aux from your radio, then you can use your phone to play music through car speakers.
You can hear music from your phone / pad / mp3 (They should have blueooth function).
Description
Bluetooth name: JieRui-BT 5908
Bluetooth version: 5.0 (compatible with the following versions)
Product voltage: 5-12V
Microphone cable length: 1.5 meters
Applicable models for:
For Subaru with aux function and 24Pin AUX IN connection
For Subaru Outback Original Car 6-disc CD player
For Subaru Legacy 6-disc CD player