Wake up to iPod, iPhone, FM (frequency modulation) radio, or alarm. When you awake, iPod or iPhone will be charged and ready to go. Auto Time Sync means you'll never have to set your clock again. The clock automatically sets when you dock iPod or iPhone. Features: iPod and iPhone authentication IC (authentication chip), dual alarm, negative LCD (liquid crystal display) display with white backlight, 3.5 mm (millimeter) audio input. Digital clock, sleep timer, snooze. Multi-step dimmer control, digital volume control. Built-in speakers with cloth speaker grill. DC (direct current): Requires an AC (alternating current)/DC power adapter (included). Battery backup for clock and alarm: Requires 2 AA batteries (not included). Black.