Movement Sensor Pad: Under-the-mattress wireless Movement Sensor Pad tracks subtle movements that sound and video monitors can't detect *(This product is intended to be used only for parental reassurance to monitor your baby’s movements.) Adjustable movement sensor pad sensitivity Low battery alarm for movement sensor pad Alarm will only sound if no movements have been detected for 20 seconds Nursery unit: Battery operated Tabletop stand for the Nursery Unit Compatible with any baby monitor, type or brand Tabletop stand for the Nursery Unit