<b>◆Note</b>: Due to the conversion of current, this product is only suitable for the Toyota RAV4 with 2GB RAM 32GB ROM Android 9.0 system car stereo in our store<br> Product link: https://www.amazon.com/dp/B07XQ7782R .<br><br>◆If your car has a JB L sound system, then you need to purchase this JB L adapter to decode its sound, otherwise there will be no sound;<br><br>◆When the JB L adapter and its harness are used, the power cord in the unit package you purchased is not needed.<br><br>◆When connected to this JB L adapter, please turn on the amplifier function of this unit, the operation path: Click "Setting" on the main menu - click "Car infotainment" - click "Sound" -- ---- Click on "Balance" - ----- open the "Ex Amp" switch.<br><br>◆If you have any problems during the installation and use, please feel free to contact us, we have a professional technical staff to answer your questions, thank you!<br><br>