Press the buttons to play soothing responses that calm your little one and send them off to a peaceful sleep. Responses include three sing-along lullabies, 40 calming melodies & relaxing nature ... sounds. Choose between the two modes to play either music or sounds. The cot light features a 15 and 45-minute timer, volume controls and light controls that operate the night light and the rotating light pattern projected onto the ceiling. The built-in sound sensor plays calming responses if baby cries. Strap included too securely attach the unit to a cot.