ROAV [Upgraded] Bluetooth Receiver, by Anker, with Bluetooth 4.1, CSR Bluetooth Chip, Noise-Cancellation, Integrated Mic… Price: $12.62 (as of 04/09/2023 16:32 PST- Details)

Plug and Play: Connect to your car’s AUX-in port to link to your smartphone via Bluetooth. The device powers on when you switch on your car’s engine.
Crystal-Clear Sound: An advanced CSR chipset rapidly processes wireless signals to deliver superior sound.
Stable Connection: Bluetooth 4.1 reliably transmits sound from up to 33 ft away.