Enjoying high performance music on the run! Easy to carry, no installation or extra device needed, all you need are a car cigar lighter and FM radio. With this gear, you have 4 ways to play music via your car FM radio system: built in 1gb memory; other audio devices such as another mp3 player with Lin-in function(works as a FM transmitter in this situation); through a SD or MMC memory card inserted in the memory card slot; through a USB drive inserted in the USB slot.