SNOO Helps Your Baby - And You - Sleep Longer. Like a 24/7 babysitter, SNOO boosts sleep with gentle rocking and soothing…for all naps and nights. Its quick response often calms upsets in under a minute.  And its “5-second swaddle” reduces dangerous rolling.  If unable to connect to Happiest Baby app, please use it in manual mode using the buttons on front of the device to start/adjust the motion and sound.