Fast and Stable: Cassette adapter with high quality Bluetooth V5.0 chip, provides faster pairing and more stable sound. It can effectively avoid unstable connection issues. You can use Bluetooth program version 5.0 immediately for your car or home system. Good sound quality: Each Bluetooth cassette adapter has been tested thousands of times and the material of each part has been carefully selected. To minimize noise and achieve premium music enjoyment. Can be charged: The second generation Bluetooth cassette adapter contains a long-lasting battery, you can enjoy music while charging, because the charging port , the on/off switch and microphone button can be hung outside your recorder. Wide range of applications: The Bluetooth cassette adapter is compatible with most Bluetooth-enabled devices such as smartphones , MP3 players, tablets. It also fits any car/truck with a cassette player. Easy to Use: Bluetooth cassette adapter without complicated installation, no cables, no tangled cables. Enjoy music in the car. With the built-in microphone, you can receive or make calls easily and comfortably. Stream music from any Bluetooth enabled device (like cell phone, tablet, etc.). No complicated installation, no cables, no tangled cables.