Multi-function transmitter: The FM transmitter is designed with 3 USB port, two ports are quick charge ports, QC 3.0 and PD 18W, and the other one is 5V/1A flash drive port. Charge two devices simultaneously, then you can share the USB car charge port with your friends. Safely charging to your device without damage to the battery.Built-in microphone: It is built-in Mic with Echo Cancellation and Noise Suppression (CVC) technology offer you a clear talking. Just one click when receiving a call, the Bluetooth FM transmitter will provide you with the hands-free function and safer driving experience.Simple operation: Just long press the CH button to power off and no need plug or unplug it out from your car socket every time, meanwhile, it won't affect charging function when charging, better saving your car battery.Bluetooth wireless design: This Car Bluetooth FM transmitter supports Siri and Google Assistant, long press call button for 3 seconds to activate. Release your hands whilst driving, without needing to look down the phone to ensure safe driving.Safety protection: The Bluetooth FM transmitter has built-in over-current protection, over-voltage protection, intelligent temperature control and short circuit protection to ensure you have a safer driving.Wireless version: V5.0Item: C68Work Distance: 5mU flash disk format & capacity:FAT32,max64GFM Frequency range: 87.5MHz-108.0MHzCompatible audio format: MP3.WMA.WAV.FLACCompatible with Bluetooth protocol: A2DP/AVRCP/HSP/HFPOrange fast filling support: QC3.0 Protocol (DC 3.6-6.5V/3A,6.5-9V/2A,9-12V/1.5A)Type-Csupport:PD18W:(DC5V/3A,9V/2A,12V/1.5A)Material:ABScolour:BlackPackage Contents:1 * Car transmitterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.