Cassette design with strong Bluetooth compatible function, you can insert the cassette into the car cassette player, then connect it to your phone via Bluetooth, enjoy the music and handsfree freely and immediately.Builtin microphone, the cassette converter supports handsfree calling, easy to start or end a call with one button. You dont need to hold the phone while driving or walking on the road.Using the latest 5.0 Bluetooth compatible chipset, provides more stable performance, steadier and better call quality, compatibility and stronger functions, supporting you clear, longlasting and continuous phone calls and stereo music.The cassette has USB ports and builtin 130mAh rechargeable battery, safe and durable, you can charge the lamp at any time by connecting to power bank, laptop or other types of USB adapter, convenient to use.Suitable for placement in the car, automobile and vehicle to enjoy music, handsfree calling and other Bluetooth compatible functions.Bluetooth compatible version 5.0Power supply USBBattery builtin 130mAh rechargeable batterySize 106.30.7 cm3.932.480.27 inchWeight 62gColor BlackMaterial ABSPackage contents1cassette adapter1USB cableOnly the above package contents, other products are not included.Note Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is13 cm.