1. The tape is designed with powerful Bluetooth compatibility. You can insert the tape into a car tape player and then connect it to your phone via Bluetooth to instantly enjoy music and hands-free functions freely. 2. With a built - in microphone, this tape converter supports hands - free calls. You can easily answer or hang up the phone with just one click, so you don't need to hold your phone while driving or walking. 3. It uses the latest Bluetooth 5.0 compatible chip, which offers more stable performance, more stable and high - quality call quality, stronger compatibility and more powerful functions, supporting clear, long - lasting and continuous calls and stereo music playback. 4. The tape is equipped with a USB interface and a built - in 130mAh rechargeable battery, which is safe and durable. You can charge it at any time by connecting it to a power bank, laptop or other USB adapters, making it very convenient to use. 5. It is suitable for use in vehicles such as cars and motor vehicles to enjoy music, hands - free calls and other Bluetooth - compatible functions. 6. Bluetooth compatible version: 5.0 7. Power supply: USB 8. Battery: Built - in 130mAh rechargeable battery 9. Dimensions: 10 x 6.3 x 0.7 cm / 3.93 x 2.48 x 0.27 inches 10. Weight: 62 grams 11. Color: Black 12. Material: ABS 13. Package contents: 1 tape adapter, 1 USB cable 14. Only the above package contents are included, and other products are not included. 15. Note: Light reflection and different monitors may cause slight differences in the color of the item in the picture compared to the actual product. A measurement error of plus or minus 1 - 3 cm is allowed.