Capacity: 4GB Samsung Memory</br>Support MP3 WMA music format</br>Built-in FM Radio: 87.5-108 MHz</br>Earphone output 3.5mm</br>Be able to use directly as a USB portable disk. Just save your files in it!</br></br>Product Description</br></br>Support 8 Music Modes: Natural, Pop, Classic, Jazz, Rock, Soft and User. Digital volume control <br/> Tiny compact Size: 31mm*70mm*17mm, 25g/1.0oz weight, 1MB/S speed. <br/> Long battery life: More than 8 hours of operation on a single AAA battery please note this device is powered by an AAA battery which is NOT included in the package. If you are using a rechargeable battery, please remove <br/>the battery before connecting to a PC or Mac.</br><br/>http://www.amazon.com/gp/product/B00AF40U5G