Dual Microphones & Hands-Free Calling: This Bluetooth Car Adapter utilizes dual microphone, greatly pick up voices from all direction while driving benefited from superior sound reception and noise suppression (CVC) technology effectively reduce road and wind noises. The hands-free car kit make your driving more smarter and safer. . Hi-Fi & 1-Key Bass Booster: The FM Transmitter Bluetooth 5.0 with DSP technology could deliver 2x steadier transmission speed without distortion for Hi-Fi stereo music. Music Player FM Transmitter with a 1-key enhance Bass button, you can select your favorite mode between Hi-Fi or deep bass mode by pressing the button "B". . QC 3.0 & PD 20W Quick Charging: FM transmitter for car Coming with 2 USB ports(QC3.0 and PD 20W), You can charge two devices simultaneously. The PD Port up to 20W output, compatibility with lastest iphone, ipad, cellphones, tablets etc. . 7 Colored LED Strip & Music Play Modes: FM Transmitter Bluetooth car adapter supports 7 colors LED backlight, including red / green / blue / yello / purple / cyan / silver white, will give you a visually stunning display of colors, which is a nice way to match the colors already in the car. You can stream music on your car stereo via Bluetooth/ USB Disk (32GB) / microSD Card (32GB). . LED Voltmeter Display & Voice Assistant: The FM transmitter will display cars voltage when plugged into the cigarette lighter. Keep abreast of car battery health at all times to avoid problems when driving. Also it support active Siri, Google Assistant or Samsung Bixby to make phone calls. .