Bluetooth 5.3 & Lossless HD Sound Quality: Bluetooth 5.3 technology has lower latency and stronger anti-interference, making transmission more efficient. CVC noise reduction technology can effectively eliminate echo and ambient noise, providing a clearer and smoother call experience. Hands-free Calling, Music & Fast Charging: You can answer/reject/hang up calls with one button, freeing your hands. You can also switch to music mode to enjoy the fun of music, making your journey safer and more convenient. Equipped with dual fast charging ports, PD 30W and QC3.0, allowing you to quickly charge two devices at the same time, solving your charging troubles. LED Display & 7 Color Light: The LED display can monitor the voltage in real time, making it clear at a glance, making driving safer. The side light button can turn on the 7-color night vision ambient light, creating a new atmosphere for your driving space. Two music connection methods: Bluetooth connection is available. After installation, search for "BC82" to connect. Or insert the USB drive into the music connector of the Bluetooth FM transmitter, and you can also start enjoying music. Multiple safety protection: Provides overcurrent protection, overvoltage protection, overheating protection, overload protection, short circuit protection, undervoltage protection, and electromagnetic protection to ensure the safety of your equipment in all aspects.