The SANGEAN PR-D14 is a true ultra-compact portable AM/FM-RBDS (Radio Data System) Digital Radio with USB port for playing MP3/WMA files from USB drive. All controls are conveniently located and you can see the frequency and the clock on the display. It also features a tone control (talk and music) for more powerful overall sound. The PR-D14 has excellent sensitivity and selectivity and will surprise you at its ability to pull in those distant stations. Five presets are available on each band and the auto seek will automatically seek the active stations across the entire band rather than to the next frequency. The radio can be set to automatically turn off after 120 90 60 45 30 or 15 minutes so you can fall asleep to the sound of music talk or news. Sleep alarm allows you to wake up to music buzzer with humane wake-up system or media by (USB). You can power it with the included AC Adapter or four "D" size batteries (not included).