The batmobile doesn’t need a cassette player or 8-track it must have a high frequency radio with Bluetooth and wifi to connect to every radio and other device in Gotham so it basically can play any song Batman wants or link into any conversation from , police transmission to cell phones ECT.
The batmobile doesn’t need a cassette player or 8-track it must have a high frequency radio with Bluetooth and wifi to connect to every radio and other device in Gotham so it basically can play any song Batman wants or link into any conversation from , police transmission to cell phones ECT.