Description 1.7 Color LED Backlit Version: Supports 7 colors led backlit light, you can get visually stunning display of colors. Which is a nice way to match the colors that are already in the car.2.Quick Charge 3.0: Efficient USB charging technology . Up to 4X faster than standard chargers, able to charge compatible devices to 80% in just 35 minutes. Equipped with a voltmeter to show you the condition of your car battery.3.Crystal Clear Music Streaming: You can stream music on your car stereo via Bluetooth/ USB Flash Drive (32GB) / microSD Card(32GB). Advanced noise reduction technology will ensure quality, crystal clear sound. Note:MP3/WMA/FLAC/AAC/WAV format music is supported.4.Crystal Hands-free Calls: Bluetooth provides a stable connection and echo-cancellation reduces background noise for better hands-free calls.5.Siri amp; Google Assistant Compatible: FM transmitter Bluetooth supports voice commands to ensure safe driving, using Siri or Google Assistant to make phone calls, send texts or get driving directions. Enjoy complete voice-control while you driving.