Ggnaxivs 4-In-1 Bluetooth 5.0 USB Bluetooth Transmitter Receiver Audio Adapter with Call Car Bluetooth Receiver

1. Receive/Transmit, 2-In-1 Function, Accept Rx+Transmit Tx 2-In-1 Design, Switch Between Dual Signals With One Button, Simple And Convenient To Use, Suitable For A Of Devices 2. When The Red Light Turns On, It Means Entering The Launch Mode. The Default Is In The Launch Mode When The Machine Is Turned On. 3. When The Blue Light Is On, It Means Entering The Receiving Mode. And Hold The Function Key To Switch Modes. 4. When You Have An Incoming Call In Receiving Mode, The Button To Answer The Call Hands-Free 5. Dual Signals Can Be Switched With One Click, Capable Of Receiving And Transmitting