2 PORTS USB CAR CHARGER: Support charging two devices simultaneously, comes with 5V-2.4A and 5V-1A charging ports, and the matching smart IC can automatically match the current. | ANSWER CALLS HANDS-FREE: High-performance microphone with Noise Suppression (CVC) technology, grants you crystal clear call. Answering/redialing/dismissing or ending call just simply click a button. | IMMERSE IN HiFi MUSIC: Insert a USB flash drive which contains MP3 files into the "RIGHT" USB port and enjoys it. If that's not enough, it can also support your playlist with a full range of audible frequencies with no distortions of the original signal from your MP3, iPhone, Android Smartphones and more Wireless enabled devices. | SUPER EASY TO PAIR WITH Wireless: Plug the Bluetooth FM transmitter into your vehicle's 12V power port or cigarette lighter and tune radio to the same frequency as transmitter, then pair your device via Wireless. | WIDE COMPATIBILITY & MEMORY FUNCTION: Fit for all Bluetooth enabled devices such as iPhone, iPad, iPod, Tablet, and other Android Smartphones. Also it will auto-connect to its memorized paired Bluetooth device when power on.