TESSLA Nature Sound Children Room Sky Star Night Light Projector Lamp Bedroom Music Alarm Clock Various display items include Time, Date, Week, Month, Year and Temperature; Back light function enables clear Time Display in the dark. Chord music / natural sound alarm mode shift and 12/24 hours mode conversion. Multiple function like Snooze and Countdown. Dynamic projection of colorful starry sky accompanied with music rhythms. Four natural sound and six chord songs for your preference. Stars Projector projects colorful stars on walls and ceiling. Powered by 3 * AAA batteries(not included)