Feature:1. Universal Compatibility: Fit for all cars and trucks with cassette players, direct use of the original car built in cassette device CD player, no modification and easy to use.2. Bluetooth 5.1 Technology: Equipped with the latest Bluetooth version, this cassette adapter ensures stable and fast wireless connection, allowing you to enjoy music without any interruptions.3. Low Power Reminder: When the battery is low, there is a low voltage indicator and a sound alarm, intelligent detection of tape operation, reduce the battery consumption caused by forgetting to shut down.4. Covenient: External charging structure, convenient to listen to music while charging, better experience, ensuring hours of uninterrupted music playback on the go.5. Wireless Music Streaming: With the Bluetooth cassette receiver, you can easily stream your favorite music wirelessly from your smartphone or other Bluetooth enabled devices.Specification:Item Type: Bluetooth Cassette ReceiverBluetooth Version: 5.1Charging Voltage: DC 5VSignal to Noise Ratio: 90dBShipped with built-in batteryBuilt-in Battery Type: Button BatteryBattery Model: CR1220Individual Battery Capacity: 40mAhNote: Product is built-in battery (already installed on the product)Applicable: Fit for all cars and trucks with a cassette player.Package List:1 xBluetooth Cassette Receiver 1 x Cable