ATC 3.5mm FM Transmitter Car Kit for Motorola Droid 2 Global, Samsung Gem SCH-I100, Sony Ericsson Xperia Arc Compatible with most smartphones and MP3 players. Great for road trips, long car rides, or everyday use. Holds your device while you're driving for hands-free conversations or use of your device. Perfect for vehicles that do no have an auxiliary port. Easy installation.