【Upgraded Bluetooth 5.3】Bluetooth 5.3 adapter provides faster date transfer and lower sound quanlity loss,optimizing the transmission delay and connection failed issue. Assure you of clear call and splendid music.【PD 20W & QC 3.0 Fast Charging】The car adapter can fast charge two devices simultaneously via PD20W and QC3.0 port, 4X faster than standard chargers. Further more, it also has another USB charging port (5V/2.4A) which can also be a USB flash drive port to play music.【Unique Big Led Display】 Vehicle voltage, FM channel, bluetooth connect status are displayed when the FM transmitter is inserted into the car cigarette lighter. It's convenient to monitor the condition of car battery and the working status of the fm transmitter.【 Hands-free Calling & Voice Assistant】Built-in microphone supports Siri voice assistant and Google voice navigation. Easily answer/hang up/reject/transfer calls with one click MFB button. The integrated microphone automatically switches from music playback to hands-free calling mode when a call is coming.【 Coloured LED backlight】Car FM transmitter has 7 coloured atmosphere lights that are switched to green/red/blue/yellow/cyan/purple/white. Makes driving more fun. there is a button switched light off. All up to your choose.【Two Music Playback Modes】Fm transmitter supports Bluetooth play, U-Disk play, meet your various needs.【Muiti-functional Button】 The MFB button supports volume adjusting, music play/pause, handf-free call, wake up SIRI, etc.