Fast Charging with PD 20W and QC 3.0 This wireless Bluetooth car adapter can charge three devices rapidly with PD 20W QC3.0 port, which is 4x faster than standard chargers. It also has a USB charging port (5V/2.4A) that doubles as a USB flash drive port for playing music and reading MP3, WMA, WAV files.Upgraded Bluetooth 5.3 The FM transmitter uses the latest Bluetooth 5.3 technology to optimize the transmission latency and connection issues of old Bluetooth 5.1. Bluetooth 5.3 delivers faster, more stable, and smarter connections with less audio quality loss, providing a seamless calling and music experience. Pairing is done in just 1 second and no need to repeat after the initial pairing.Hands-free and Voice Assistant The built-in microphone supports Siri and Google Voice Assistant. With just one click of the MFB button, you can easily answer/hang up/reject/transfer calls. When a call comes in, the integrated microphone automatically switches from music playback to hands-free mode.HD Display Screen Unlike ordinary car Bluetooth FM transmitters, this one can display an additional voltage value. When inserted into the car cigarette lighter, it shows the vehicle's voltage, FM channel, and Bluetooth connection status. This makes it convenient for monitoring the car battery and selecting frequency while tuning.7-color LED Lights Designed with 7 colors, including green, red, blue, yellow, cyan, purple, white, and flashing, this shiny external electronic car kit makes your car more enjoyable. The LED lights can be turned off. Keywords: FM transmitter, fast charging, Bluetooth 5.3, hands-free, voice assistant, HD display screen, 7-color LED lights.