Additional Information  Bluetooth audio: wireless audio streaming; Reson8 technology for clear, rich sound Color Changing 6 Modes: slow fade, fast change, favorite color, pulse-to-music, sky gradient, nightlight. Wake and sleep - FM radio, blue-tooth device or 4 built-in tones Wake-to-light - 7 modes- dawn, slow fade, fast change, favorite color, pulse-to-music, nightlight, sky gradient Programmable snooze time - Allows you to sleep a bit or a lot with snooze time between 1 and 29 minutes. AC adapter - 100V - 240V universal voltage; sure alarm backup: CR2450 battery included Volume sync - It's very convenient when the volume on the speaker and phone synchronizes automatically. 7-5-2 alarm technology - 7-5-2 alarm schedule feature lets you set alarms for every day, weekdays or weekend. Dimmable clock display - 4 adjustable brightness levels; scheduled dimmer: set colors and clock to automatically dim and brighten daily; dimmable backlit buttons: for great visibility of controls USB charging port powers your devices quickly and efficiently