[SAFE TO USE]This FM transmitter Bluetooth for cars has built-in over-current, over-voltage, and short-circuit protection, effectively preventing multiple problems. Worry-free 12-month. [CAR RADIO ADAPTER &MUSIC PLAYER]The car radio Bluetooth connects the car radio via the FM channel. Then you can enjoy music from Bluetooth devices/TF card(=64GB) /USB flash drive(=64GB) to the car stereo. [TYPE-C & QC USB CHARGER] This FM transmitter fit 12V/24V car cigarette socket.It can fast charge two devices simultaneously via the USB C (PD3.0) port and QC3.0 USB port. The USB-C Port can fast charge compatible with Samsung, iPhone, and Google from 0 to 50% in half an hour. The Quick Charge 3.0 USB Port can charge devices from 0% to 80% within 35 minutes. [HANDSFREE FM BLUETOOTH TRANSMITTER]The cigarette lighter Bluetooth adapter connect the cellphone via Bluetooth, One-click to answer/redial/hang up or reject calls. Built-in microphones and noise suppression (CVC) tech for clearer Hands-Free Calls. You can keep your eyes on the road making driving more interesting and safe. [7 COLORS LED BACKLIT MODE]This Bluetooth car adapter has 7 color lighting modes and 1 cycle color mode that can get a visually stunning display of colors, you can keep 1 color or play the colors in turn. Perfect for using in the dark and improving driving safety.