1) Upgraded Bluetooth 5.4 Technology The latest Bluetooth 5.4 technology optimizes transmission delay and reduces connection defects. It offers a faster, more stable and smarter connection with less sound quality loss, uninterrupted calls and music experience. Pairing is completed in about 1 second, and after the first successful pairing with your device there is no need to repeat the pairing process. 2) 20W PD Fast Charging QC 3.0 Dual USB fast car charging and a TypeC port allow you to charge three devices simultaneously and provide better charging performance. Equipped with a TypeC power port and 20W output power, you can charge the latest mobile phones and computers. 3) Clear Hands Calling The aux Bluetooth adapter for car supports onetouch answering, hanging up, and rejecting calls, making your driving safer. Longpress the CH button for 3 seconds to reject calls, doubleclick to redial, and singleclick to answer or reject. Builtin microphone with Noise Suppression (CVC) technology provides clearer sound for hands calling. 4) Compact and Portable Its small size and lightweight design makes it convenient to carry and move between vehicles if needed. The device has a compact and spacesaving design, and its userfriendly interface ensures easy installation and operation. It is plugandplay, requiring no complicated setup or installation procedures. Use scenarios Daily commute or road trips: Connect to your car stereo for hands calls, streaming music, and simultaneous device charging without clutter or setup hassle. Rideshare or fleet use: Passengers can answer calls and charge devices quickly, while the driver maintains focus on safety and a tidy dashboard. Traveling between multiple vehicles: Move the compact adapter between cars for quick, tool setup and immediate use.