The Monster Bluetooth FM Transmitter is a great way to listen to your favorite music while driving. Connected to your car’s cigarette lighter, you’ll be able to wirelessly stream audio to your FM Stereo from your phone. Bring your laptop or tablet along to stream more tunes through the transmitter. Our device also works with MicroSD Cards and Flash Drives to connect more types of music files including MP3, WMA, WAV and FLAC for a more unique experience. We have also included two USB ports for simultaneous charging of compatible devices while you drive, which collectively power up to 3.4 Amps. Our external microphone allows you to make hands-free telephone calls or activate your voice control option. The transmitter also connects to Siri® and Google Assistant for full Voice Control functionality. Make the most out of your music while driving with the Bluetooth FM Transmitter With 3.4 USB Charging and External Mic.