... sound wake up light function : light becomes stronger and stronger from 0,15,30,45,60,75,90mins ... until the time pre-set, like the sunrise! Features and Spec.Natural sound wake up light function : light becomes ... stronger and stronger from 0,15,30,45,60,75,90mins ... set alarm at the favorite radio station,nature sound,and 9 music6)Blue backing light 7)Out put ...