90 Day No Hassle Money Back Guarantee from PHILIPSColored sunrise simulation alarm clock wakes you up gradually with natural light and choice of 5 natural wake up soundsDeveloped with Philips' Clinical Sleep & Respironics Healthcare knowledge and 100+yrs of Lighting expertisePhilips' #1 best-selling Wake-up Light; Only Philips Wake-up Lights clinically proven to workFM radio and a tap-to-snooze alarm clock