[3 Playback Modes]with Cvc Noise Canceling Technology, You Can Enjoy Full-Duplex Sound Quality Through 3 Methods: 1)Play Music Through Bluetooth; 2) Play Music From Sd Card (Up to 32Gb), Supporting Mp3/Wma/Wav/Flac Format Files; 3) Stream Music From Usb Drive (Up to 32Gb). [Hands-Free Calls Navigation Broadcast]One Click Mfb Button to Answer/Redial/Hang Up Or Reject Calls; Easily Switch Between Incoming Calls and Music. This Fm Transmitter Supports The Existing Navigation App On Your Phone, You Don'T Need to Look At The Phone to Ensure Safe Driving. [Car Voltage Detection Blue Ambient Light]The Adapter Bluetooth Car Will Display The Voltage of The Car When It is Plugged Into The Cigarette Lighter. Keep Abreast of Car Battery Status At All Times to Avoid Drivability Issues. with The Blue Backlight Circle At The Bottom Greatly Simplifies Your Operations for Safer Driving.