This 5.3 version wireless USB Bluetooth adapter has a stable connection range of 10 meters and can provide a clear, practical and pleasant sound experience. Special note: it only supports phone calls in receive (RX) mode, not in transmit (TX) mode. In RX mode, this adapter can connect and support two devices at the same time, such as car audio and home audio, to meet your audio needs in different scenarios. In TX mode, it supports the operation of one device at the same time, such as TV or personal computer (PC). This car Bluetooth USB adapter with 3.5mm interface is widely compatible with devices with 3.5mm jack and USB A interface, and there is no need to install additional drivers for any compatible device. In terms of design, this Bluetooth audio adapter adopts an ultra-compact and lightweight body, which is easy to carry in your pocket or bag. It is worth mentioning that when you want to connect the TV to Bluetooth headphones or Bluetooth speakers, you only need to operate in TX mode. At this time, the USB interface is only used for power supply, and you need to connect the 3.5mm audio cable to the audio output port of the TV. The product's Bluetooth function will automatically search and connect to your Bluetooth device. Once connected, it will start transmitting the TV's audio signal, allowing you to enjoy a freer audio experience.