Aux to Bluetooth?

Is there such a device that takes audio from the analog input and transmits it via Bluetooth to headphones or speakers, for example?
The task is to transmit sound from a cassette player via Bluetooth to wireless headphones without analog input.
Google gives only the adapters for the car, and they work in the other direction - a Bluetooth signal, and they convert it to analog.
July 9th 19 at 10:11

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