PictureSound BT Ultimate Bluetooth Car Fm Transmitter with USB port support,Sd-card (support upto 16gb *),line support for MP4/WMA/MP3 (iPhone 4, 3Gs & 3G, iPod, Zune) (RED * Compatible with all cell phones) Includes infrared remote *
plane and simple, it don't freeking work.  I have tried linking it to diffrent i-phone 4s's and still was unable to git it to work.  the headphone jack accessory worked well, however the usb plug to charge does not.. try something elts.. gess im gona.