By seamlessly integrating an FM transmitter with the versatility of a car power adapter TuneBase FM for iPod offers the outstanding convenience of an all-in-one solution on the road. Its improved FM transmission delivers crisp clean audio performance for an unsurpassed listening experience in your car. A built-in FM transmitter wirelessly connects to your car stereo on multiple FM channels from 88.1MHz-107.9MHz. Your iPod content goes through the FM channel and TuneBase FM lets you choose the best available frequency for listening. It features four programmable memory slots that let you easily find the clearest frequency and toggle among them for best performance. You can listen to your iPod player easily through your car stereo with TuneBase FM. The holder secures your iPod and features an innovative flexible-steel neck for easy repositioning. The package includes tray adapters to fit various iPod models.