Ports USB Car Charger 3.0: Supports charging two devices simultaneously, one port is Quick Charge 3.0 port. This fast charging port is also compatible with: 2.0, Hua Wei FCP, Type-C and Samsung. The charger efficiency is more than 80%. Answer Calls Hands-Free: The high-performance microphone with CVC noise cancellation technology allows you to enjoy crystal-clear calls. Answer/redial/reject or end a call, just click a button. Immerse yourself in HiFi Music: Insert a USB flash drive containing mp3 files into the correct USB port and enjoy. If that's not enough, it can also support your playlist without distorting the original signal from your MP3, iPhone, Android smartphones and more Bluetooth-enabled devices. Wide Compatibility: The Bluetooth car FM transmitter can be paired as a hands-free device with all Bluetooth-enabled devices such as iPhone, iPad, iPod, tablets, Samsung, HTC, Sony, and other Android smartphones. Multi-Safety Protection: Comes with built-in overcurrent protection, overvoltage protection, intelligent temperature control, and short circuit protection.