Main Functions

• Bluetooth Connection and Calling: Adopting Bluetooth 5.0 technology, it can easily connect with Bluetooth devices such as mobile phones to realize wireless music playback and hands-free calling. Equipped with a built-in microphone, it supports functions like answering, hanging up, rejecting, and redialing calls. Some products also feature CVC noise cancellation technology, ensuring clear call quality.
• FM Transmission: It has full FM frequency transmission function, with a frequency range usually from 87.5 to 108.0MHz. Users can set the transmitter to an idle FM frequency and match it with the car radio, thereby playing music or listening to radio through the car audio system, achieving noise-free music and radio program playback.
• Music Playback: It supports playing music stored in USB flash drives or SD cards. Some products support music formats including MP3, WMA, WAV, FLAC, APE, etc., meeting users' different music playback needs.
  
• Digital Display Function: Equipped with an LED display or nixie tube display, it can clearly show FM frequency, song information, car battery voltage, etc., making it convenient for users to know the working status of the device and the voltage of the car battery.
• Fast Charging: It usually has dual USB ports or triple USB ports, allowing simultaneous charging of two or three devices. Some USB ports support fast charging protocols such as QC3.0, which can quickly charge USB-powered devices like smartphones and tablets, improving charging efficiency.