📼【Bluetooth Cassette Player 】A portable Bluetooth tape player brings retro audio into 2021; You can transmit the tape music to other Bluetooth receivers, it allows you to listen to your favorite jams with wireless headphones or even link it to a Bluetooth speaker, should you wish 📼【USB/ AA Battery Power 】 For powering this unit up, you can rely on 2 AA batteries or USB power to charge it up. USB-DC power cable is included so that you can power it via power bank/ computer/ USB Plug; It even runs on AA batteries, just like the old Walkmans did. The tape player also accepts all 3.5mm interface devices such as speaker, earbuds, car audio speaker