A. The tape is designed with strong Bluetooth compatibility. You can insert the tape into a car tape player and then connect it to your phone via Bluetooth to enjoy music and hands - free functions. B. With a built - in microphone, this tape converter supports hands - free calls. You can easily answer or hang up the phone with a single click, so you don't need to hold your phone while driving or walking. C. It uses a Bluetooth 5.0 compatible chip, which provides stable performance, stable call quality, strong compatibility and various functions, supporting clear, long - lasting calls and stereo music playback. D. The tape is equipped with a USB interface and a built - in 130mAh rechargeable battery, which is safe and durable. You can charge it by connecting it to a power bank, laptop or other USB adapters, making it convenient to use. E. It is suitable for use in vehicles such as cars and motor vehicles to enjoy music, hands - free calls and other Bluetooth - compatible functions. F. Bluetooth compatible version: 5.0 G. Power supply: USB H. Battery: Built - in 130mAh rechargeable battery I. Dimensions: 10 x 6.3 x 0.7 cm / 3.93 x 2.48 x 0.27 inches J. Weight: 62 grams K. Color: Black L. Material: ABS M. Package contents: 1 tape adapter, 1 USB cable N. Only the above package contents are included, and other products are not included. O. 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.