Features: 2 In 1 Bluetooth Transmitter Receiver - 1. Transmitter(TX) mode: transmit audio from non-Bluetooth audio sources (TV, PC, CD / DVD player, etc.) to Bluetooth headphones / speakers via 3.5mm audio cable. 2. Receiver(RX) mode: transmit audio from Bluetooth audio sources (smart phone, tablet) to non-Bluetooth speakers / car / home sound system via 3.5mm audio cables. Bluetooth 5.4 Technology: The Bluetooth wireless transmitter adopts the latest Bluetooth 5.4 technology, which can reduce power consumption and provide fast and stable transmission. The transmission distance can reach 10 meters, Lightweight and easy to carry, It's small and sleek design keeps things neat and tidy! Enjoy Music&Handsfree Call: Bluetooth adapter features a built-in microphone with advanced noise-reduction technology for crystal-clear calls. With just one click, you can effortlessly answer or end calls. Plug it into your car's aux port and pair it with your device to stream phone music to car speakers. Wide Compatibility: This transmitter receiver offers broad compatibility, easily integrating with various devices, be it older stereo systems, speakers, car stereos, televisions,gym equipment, PCs, or MP3 players that have a 3.5mm AUX Jack interface. It provides a quick and effective solution for making non-Bluetooth devices wirelessly accessible. No Batteries: USB has power function. When in use, it must be powered by power device with USB port (such as AC adapter, car charger, laptop). You don't need to remember to charge it! Also, since it's not running on batteries after turning off the car, your phone doesn't stay connected. Easy to Use: You simply need a audio aux input and available USB charge port. One Button to change TX/RX mode. LCD Screen make your operation visible. Pairing was incredibly easy and quick! Within seconds, You have your device connected. Wide Application: Whether you’d like to stream the TV audio to your wireless headphones/Bluetooth speakers or if you want stream music or listen to phone calls through car’s speakers, but your vehicle didn't equipped with Bluetooth, the Bluetooth audio adapter makes the perfect choice to suit all your needs.