GSI Super Quality In-Car Wireless Hands-Free FM Modulator-Transmitter for MP3/MP4/iPod/iPhone/CD/DVD Players - SD/Memory Card/Flash Slot - Line-In Function - LCD Display - Cigarette Lighter Plug - Includes Remote Control - Blue
I needed a way to listen to my CD's in my service truck, which only had an AM/FM radio. I installed this and plugged in my portable CD player, and viola! Works really well.