This is not just a comforter, this super soft blanket can hold your pacifier and also play several soothing melodies: heartbeat sound, white noise, nature sound and a loop of lullabies. Switches off by itself after 10 minutes and the cry sensor will make sure it is turned back on when your little one starts crying. Becky's features - 4 soothing melodies; 3 lullabies, white noise, heartbeat and nature sounds - Calms by mimicking a mother's heartbeat - The module can be shaken to activate - Automatically plays when your baby starts to cry in the night - Volume is adjustable - Automatic shutdown after 10 minutes - Works with 3x AAA batteries (not included) - Dimensions: 35x35x8 cm