Clip the Snuza Hero onto the waistband of your baby's diaper and switch on. Snuza Hero will detect your baby's every movement and will alert you if your baby's movements are very weak or fall to less than 8 movements per minute.If no movement is detected for a period of 15 seconds, then Snuza Hero will vibrate gently.lip the Snuza Hero onto the waistband of your baby's diaper and switch on. Snuza Hero will detect your baby's every movement and will alert you if your baby's movements are very weak or fall to less than 8 movements per minute. If no movement is detected for a period of 15 seconds, then Snuza Hero will vibrate gently.