Upgrade Bluetooh 5.0 Reciver and transmitter 2 in 1 : usb to bluetooth adapter is upgrade type with mode switch , is designed for non-bluetooth car tv, pc home stereo , when it at bluetooth receiver mode, it can made you car speaker become bluetooth speaker and enjoy streaming music from your smartphone tablet or other Bluetooth device, when it at bluetooth transmitter mode , you can use it with TV or Laptop , and pair with bluetooth speaker or bluetotoh headphone as you like | easy to use and swith modes : this bluetooth adapter is very easy to use and swith modes No batteries required , plug and play .RX MODE : Plug in and plug swith to RX mode , you can use it pair with mobile phone or tablet ; TX MODE:Plug in and switch button to TX mode,it means at TX mode , you can use it for TV or Laptop and pair with bluetooth speaker or headphone. | high-quality sound :durable design with Bluetooh 5.0 version , it can bring you a high quality sound , you can enjoy streaming music at your car home or anywhere you like,the package come with rca cable and 3.5mm audio cable,you can with it with speaker too. | small and simple : this car bluetooth adapter is very small and simple , also very easy to use , no battery required , usb port plug in and power on , unplug and power off . it is a best gift for you and your friend .buitl in mic , you also can use it for handsfree calling | WIRELESS FUNCTION : Want to watch football/baseball / Boxing / Golf / basketball game late at night without waking anyone up? This is a great chose for you. Bluetooth transmitter function wirelessly streams audio to Bluetooth speakers or headphones from your TV or older media devices like portable CD players that lack built-in Bluetooth.