SuperSonic IQsound Wireless Bluetooth FM Transmitter with Hands-Free Talk Function, Black Built-in BT receiver allows you to wirelessly connect to your iPhone, iPod, smartphone, Android tablet, MP3 player and more Hands-free talk function, offers you more safety when driving Simultaneously charge 2 portable devices while in use Built-in USB input. Built-in micro SD card reader. 3.5 auxiliary input. Built-in microphone.FM transmitter frequency: 87.5-108 MHz LCD display with backlight. Flexible cable can be bended and adapted for any type of vehicles. Ultra compact size, easy to carry, store and use