Natural Sound Alarm Clock 7 Color Changing Light LED Screen 3AAA Battery Powered Small Music Alarm Clock Alarm with 6 nature sound avaliable and wake up 7 color changing light. Clock function(month, date, hour,minute, weekday)(12hour/24hour selectable). After install battery, normal time display AM 12:00 at 12hr mode Time setting. After normal mode,press SET key to enter into time and date setting. Setting range: year:2000-2099, month:1-12, date:1-31, hour:0-23, minute:1-59 12hr & 24hr time mode, at normal mode, press UP key tp change 12hr and 24hr mode. Temperature detection with range 0C to 50C. Please do not mix new battery with the old one, otherwise the light may be dark or not bright, or the sound is not natural, replace battery when display is not clear. The light is not always glowing, but it goes back off for a while, and it lights up when you press any button. Snooze function, snooze interval adjustable: 1min ~ 60mins. No radiation, give you an good sleep in a natural environment, unlike cell phones have radiation.