FeaturesAuto Reverse Function: The cassette walkman player with auto-reverse allowing you to listen to the AB sides of the tape repeatedly without having to change the sides manually.Bluetooth Cassette Player: The portable cassette players built in Bluetooth transmitter automatically start searching for paired Bluetooth receiving devices and remind you the status by indicator lights. You can easily transfer cassette music to your headset or speaker no need to connect wired headset or speaker to the cassette player.Multi Purpose: Volume adjustment knob and headphone jack you can connect headphones to listen to music when you dont want to use Bluetooth devices.Easy to Use: Five function buttons play stop fast forward fast reverse and loop; 2 power supply options two AA batteries or USB power.Portable: Compact size and suitable weight make you could listen to the cassette music anywhere with this bluetooth cassette player.SpecificationItem Type: Bluetooth Cassette PlayerMaterial: ABSBluetooth: 4.2Effective Distance: About 10m / 33ft (Related to the bluetooth receiving device and the surrounding environment)Audio Channel: Left and Right Channel StereoAudio Input: Cassette TapeAudio Output: Headphone Jack (3.5mm Stereo Audio Interface) Bluetooth TransmitterUser Interface: Function Buttons-Play Stop Fast Forward Fast Rewind Cycle Switch Automatic Return. Volume Adjustment Knob Bluetooth Work Indicator-Blue fast flashing means searching for pairing slow flashing means pairing successful working off indicates that the pairing was not successful.Power Supply: 2 X AA Batteries or 5V USB Power Supply (This product does not come with batteries)Package List1 x Bluetooth Cassette Player1 x USB Cable1 x Headphone1 x Manual