[Bluetooth 5.3 Aux Receiver]: This Bluetooth adapter can add Bluetooth functionality to your vintage stereo/wired speaker/Amplifier/old car stereo, allowing you to enjoy music wirelessly, and answer hands-free calling. Make your party or road trip more fun [Bluetooth 5.3 Tech, Easy to Use]: One key to power on and enter pairing mode. Built with Bluetooth 5.3 technology, this Bluetooth receiver can provide 2X more stable connection, and 2X faster pairing speed than Bluetooth 5.0 [Hands-free Calling & Navigation]: A built-in microphone and an "MFB" button to answer/redial/hang up/reject calls. Bluetooth audio adapter supports voice navigation and activate Siri. No need to look down at your phone while driving to ensure your driving safety! [True Wireless Stereo]: The Bluetooth receiver supports True Wireless Stereo (TWS). Purchase two Bluetooth receivers to stream audio to 2 separate sets of speakers - one will become an R channel and the other one will become an L channel, bringing you a great booming stereo. It's good for parties, movies, and music (sold 1 as a pack) [Long battery Life & Fast Charging]: The built-in battery has a long battery life and can support up to 12 hours of use after full charged. Fast charging and can be fully charged within 2 hours. [Mini Size & Portable]: This Bluetooth audio adapter is smaller and more portable. Working range up to 33ft, not limited by wires. Support Devices: Home stereo, speakers, headphones, earbuds, audio music streaming sound system, car stereo system, PC, etc. Colour:Gray-black Material:plastic Package Contents: 2 x Bluetooth Car AUX Adapter