[Bluetooth 5.0 and Clear Sound] The FM transmitter adopts the latest Bluetooth 5.0 chip, providing a more stable connection. High-performance microphone with CVC or A2DP noise reduction technology ensures clear calls and stereo music. Do not turn the radio volume up too high (usually to 18 or lower) for better sound quality. The BC49BQ FM radio transmitter has been upgraded for a second time. [2 USB QC3.0 and 5V or 2.4A] Quick Charge 3.0 The USB charging port (5V or 3A, 9V or 2A, 12V or 1A) for charging, compatible with all versions of technology fast charging (1.0, 2.0 and 3.0). Automatically adjusts the voltage received from the vehicle so that your devices are always charged with a constant current. It can fast charge any smartphone with fast charging enabled and is up to 4 times faster than standard charging ports. [3 Play Modes] Listen to music from Bluetooth device via FM signal Stream music from TF card playback (up to 32G) Support MP3 or WMA or WAV format and 3.5mm audio jack. Supports SIRI voice assistant. 1) Plug it into the cigarette lighter 2) Turn on your car radio and select a clear and free channel 3) Set the FM transmitter and car FM radio to the same frequency (87.5-108.0MHz) 4) Your phone connects to the GRDE transmitter via Bluetooth. [Colorful light and 2 in 1 installation] With lighting function - Short press the lamp button to change color and long press to switch to gradient breathing mode. The main unit can be fixed with an air conditioner fixing clip or glued with a 3mm glue stick base. [Easy Operation and High Compatibility] Built-in microphone, you can answer or end calls, play or pause music, check next or previous song with easy operation. Bluetooth 5.0 FM Transmitter Hands-Free Calling: Bluetooth 5.0 provides a strong and stable connection for reliable hands-free calling. Built-in microphone, this FM transmitter completely frees your hands and brings you a safe and relaxed driving. Intelligent voice assistant: Support SIRI voice assistant, long press 2 seconds and activate SIRI voice assistant, intelligent driving. QC3.0 or 2.4A [2 USB Ports and Quick Charge]: Charges 2 devices at the same time and provides overcharge protection. A USB port supports QC3.0 quick charge, which can quickly charge devices such as cellphones or tablets. Specifications: Bluetooth Version: V5.0andEDR USB Charging Output: 5V or 2.4A 5V or 3A Product input: 12V - 24V FM transmission distance: 10m Playback format: MP3 or WMA or WAV Audio output: TF card (32GB max.) Aux cable, Bluetooth. FM frequency: 87.5 MHz - 108.0 MHz Bluetooth V5.0 Equipped with the latest Bluetooth 5.0 technology, faster connection and more transmission stable, anti-interference and noise canceling (CVC) function, providing clear calls and stereo music. andlt brandgt 2 USB Ports: QC3.0 and 5V or 2.4A Charges 2 devices simultaneously and provides overcharge protection. Automatically adjusts the voltage received from the vehicle so that your devices are always charged with a constant current. It can fast charge any smartphone with fast charging enabled and is up to 4 times faster than standard charging ports. Voice Navigation or Voice Assistant When connected to your phone via Bluetooth, the car FM transmitter will alert you to navigate using the app from your phone. Support SIRI voice assistant, long press 2 seconds and activate SIRI voice assistant. You can use Siri function to call someone or dial the phone number by phone.