[Raising Bluetooth 5.3] FM transmitter uses the latest Bluetooth 5.3 technology that optimizes the transmission delay of the old Bluetooth 5.1 and connection error problems. Bluetooth 5.3 will provide a faster, more stable and smarter connection with less sound quality loss. Uninterrupted searches and music experience. It takes only 1 second to complete the pairing and you do not need to repeat the match after the first successful pairing with your device. .? [PD 30W and QC 3.0 Double Port Fast Charging] Bluetooth FM transmitter is equipped with the PD 30W Type-C and QC3.0 18W USB charging port, charging two devices quickly at the same time. Samsung Super Fast Charging and iPad Pro/iPhone/Google/Moto/LG/Android device supports quick charge. This 48W high -power vehicle adapter charges faster than 99 %of Bluetooth vehicle adapters in the market. .? [Developed double microphones -based calls] double microphone, while working together to collect your voice from all directions, the latest CVC 8.0 noise reduction technology prevents more road noise, wind noise, and other distraction elements. Thus, it allows both you and the caller to hear very clearly. Just press the search button and enjoy hands search and r driving .? [Hi-Fi deep bass and Aux mode] Just press the 'B' button and enjoy the strong deep bass and immersive stereo sound. High quality Hi-Fi sound quality will make music more dynamic and ears and will take your passion for music to a level. In addition, this Bluetooth vehicle adapter supports the AUX connection and USB memory connection, so that you can connect your FM transmitter to your vehicle with the AUX cable given together and enjoy CD -like sound quality. .? [Secure Protection and Universal Bluetooth Vehicle Adapter] CE, FCC and ROHS certificates have passed. Multiple protections for overflow, overload, overload, overheating and short circuit. Most of the smartphones and bluetooth devices are compatible. Like iPhone/iPad pro/samsung/Google/mp3 player/Android phone. Suitable for 12-24V vehicle lighter (car, SUV, truck, etc.) .? [How to connect for the sound] 1. Set the vehicle radio to an unused station (Supports 88.1-107.9 MHz) 2. Match the FM transmitter via the vehicle radio. Tip: unused station/empty channel, music or vocal, refers to only rustling station