1. With the Bluetooth cassette adapter, your cassette deck player can immediately turn into a wireless Bluetooth recorder. It can be used in car or home systems. 2. It can stream music from any Bluetooth - enabled device, such as electronic devices based on iOS and Android systems, tablets, etc. 3. No complicated installation is required. There are no cables and no cassette winding problems. Just turn it on, and it will start automatically. 4. Thanks to the built - in microphone, when driving, you can safely keep your hands on the steering wheel, activate the phone's hands - free function, and easily answer calls and listen to sounds. 5. It is installed with a Bluetooth CSR chip of version 5.0, which enables 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. 6. 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 because the charging interface, switch, and microphone button can all be set outside the cassette deck. 7. Package contents: 1 Bluetooth cassette adapter.