BESTEK 4 iphone FM transmitter car ipod car FM transmitter mp3 player wireless FM transmitter usb with remote control SD / MMC card slot + USB stick + Audio input jack, mp3 FM transmitter car kit for iphone 4,3gs&3g,ipod touch.Nano,Classic S650 High Power to overcome FM channel bleedthru Low noise ratio Extended range wireless SD card (up to 32Gb) slot for MP3's USB flash drive jack for MP3's from your thumb drive