1. Ambient light switch design: Press the red 'B' button twice to directly turn the colored lights on or off. 2. Upgraded Bluetooth 5.3 technology: The latest Bluetooth 5.3 technology optimizes transmission delay and connection issues. Bluetooth 5.3 delivers a faster, more stable, and smarter connection with minimal sound quality loss, ensuring uninterrupted calls and music experiences. The connection completes in just 1 second, and no reconnection is needed after the first successful pairing with your device. 3. Intelligent dual USB ports and fast charging: Equipped with two USB ports (PD 36W and USBA 12W), it allows simultaneous charging for two devices. Builtin overcurrent protection, overvoltage protection, intelligent temperature control, and shortcircuit protection ensure safe and efficient charging. 4. Crystalclear music streaming: Bluetooth 5.3 ensures a stable connection, while noise reduction (CVC) technology and echo cancellation provide an exceptional hands calling experience. Additionally, this Bluetooth car adapter supports both Bluetooth and USB stick connections (≤ 64 GB).