A. With the Bluetooth cassette adapter, your cassette deck player can turn into a wireless Bluetooth recorder. It can be used in car or home systems. B. It can stream music from any Bluetooth - enabled device, like electronic devices based on iOS and Android systems, tablets, etc. C. No complicated installation is needed. There are no cables and no cassette winding issues. Just turn it on, and it will start automatically. D. Thanks to the built - in microphone, when driving, you can keep your hands on the steering wheel, activate the phone's hands - free function, and answer calls and listen to sounds easily. E. It is installed with a Bluetooth CSR chip of version 5.0, which allows for fast and seamless pairing and automatic re - connection when powered on. The red and blue lights flashing indicate that it has entered the pairing mode. After successful pairing, the blue indicator light flashes once every 5 seconds. It has the advantages of a longer transmission distance and lower power consumption. F. This Bluetooth cassette adapter has a built - in durable battery, which is suitable for long - distance travel. With the Bluetooth function, you can listen to music while charging as the charging interface, switch, and microphone button can all be set outside the cassette deck. G. Package contents: 1 Bluetooth cassette adapter.