Play your tape collection with this portable cassette player. Press the "DIR" button to auto reverse the cassette. If the play button cannot be pressed down, it may be caused by the key being stuck or the controls not being reset. Bluetooth 5.0 offers wider coverage, faster speed, longer distance and lower power consumption compared to Bluetooth 4.2. Note: Old tapes may have degraded sound quality. Ensure your device has Bluetooth mode enabled if connection issues occur. This device functions as both a Bluetooth receiver and transmitter. Transfer music to Bluetooth headphones or speakers, or connect directly to your phone. If buzzing occurs during pairing, keep the speaker away from the tape drive to reduce interference. Features a 3.5mm interface for speakers, headphones or car stereos. FM radio mode requires 3.5mm headphones as an antenna and supports automatic channel search. Powered by 2 x AA batteries (not included) or a DC 5V power supply (not included). The auto reverse function allows you to choose between single or double-sided playback. Compact and portable for easy travel.