Cry Detection Technology responds to cries and helps soothe baby back to sleep Soothing motion has varying speeds to help baby fall asleep 3 different motion speeds to fit baby's preference 2-speed vibration helps to further soothe and comfort baby Choose from white noise, music, or nature sounds Graco Sense2Snooze Bassinet with Cry Detection Technology is the only baby-operated bassinet by Graco. It uses a special built-in microphone to detect baby's cries and responds by adjusting varying soothing settings to help soothe baby back to sleep.