Make bedtime magically simple The children's training alarm clock makes bedtime magical and simple. It uses colors to help children better understand when to sleep and when to wake up, while allowing parents to get more rest. It can change the game rules and save sleep. TIME TO WAKE UP when your alarm clockstarts ringing the light willswitch to green indicatingthat it's time to get up. TIME TO SLEEP when the sleep alarmgoes off,the clock turnsred to signal bedtime NIGHT LIGHT The night light has 10vivid colors and a 3-leveladjustable dimmer forbrightness. SOUND 14 sounds: 2 of whitenoise, 6 of soothing musicand 6 of natural sounds. NAP TIMEP The nap timer enablesquick setting withoutchanging the wake-upalarm 9-Minute Snooze Function The 9-minute snooze function allowsyour child to wake up in a more naturaland comfortable way. Can the wake-up alarm only display green light and not make a sound? Absolutely, when setting your alarm, just adjust the volume to "U0". This should ensure that you're only awakened by the greenlight, without any sound. How to turn off the alarm when it rings? Just press any button to turn off the alarm when it rings. Is this clock come with bulit -in battery? No, this alarm clock needs to be plugged in to use, the package comes with a charger and cord! What's In the box? Each package comes with a star alarm clock , a charger and cord, a user manual with an exquisite gift box. What should l do if the clock stop working? please try : 1.Please change a cord or charger to test if it's the cord or charger's issue .lf yes, we will resend a new charger or cord. 2.Please reset the clock :use a needle to insert the reset hole and press for 2-3 seconds then turn on again .