TeckNet Bluetooth FM Transmitter Hands-Free Car Kit Charger Support USB Driver for Apple iPod/iPhone, Samsung, iPad, Nokia and Other Mobile Devices Support USB driver (up to 32GB) and Aux Input, transmits your favorite tunes from your USB driver to your cars FM stereo system, even your mp3 player (Aux In) Simply paired your phone with the Bluetooth FM Transmitter and its hands-free system can set free your hands during answer the calls and let you safely drive. Equipped with On-Board Volume, Play Settings, and Phone Controls. The compact design ensure a good fit in nearly any vehicle. A built-in microphone with enhanced voice detection makes hands-free calls easy. Plug-in, sync your phone, and you're ready to talk. TECH SPECS - Suppots MP3 and WMA format files / Bluetooth Profiles: HSP, HFP, A2DP, & AVRCP / Frequency Range: 88.1 - 107.9 MHz / Input: DC 12V/24V / USB Output: 5V 2.1A max