Instruction Guide Alex October 24, 2018 13:18 Updated Follow SoundFly SD_Manual.pdf 2 MB Download Related articles Instruction Guide What is the difference between this model and the Soundfly AUX FM Transmitter? How does it identify, browse and show on display the various mp3 file folders on SD card ? How can I access the Fast Forward and Reverse functions using the controls on the unit (without using the remote). I recently brought this device. I am not able to play my ipod connected to this device using the USB interface. Thanks in advance for your help. Comments 0 comments Please sign in to leave a comment.