The Kid'Sleep Moon can be used from birth as a traditional wake-up light and later on the sleep training function can be used. There are also 4 different lullabies to help baby fall asleep (2 musical lullabies / fountain / heartbeat). If the sleeping figure's image lights up and you see the moon, stay in bed and sleep a little longer. At the set time the sun will rise and the light in the sleeping character will turn on, now it's okay to get up. There are 3 settings: night/nap + weekend! In the morning when the moon starts to set (adjustable duration), the child knows it's almost time to get up. In the evening when the sun starts to set (adjustable duration), the child knows it's time for bed. When it's time to wake up, the transition from sleeping to wakefulness can be accompanied by one of the 4 different alarms. This model is by far the best seller due to its many features. Product info: Sleep training function Alarm + silent mode Adjustable brightness Wake-up light 2 settings of night time, weekday morning / weekday nap Animated LCD screen Easy setting of the menu Works with cord and/or batteries