Our Movement Sensor with Sound Monitor detects your baby's slightest movements, even while she sleeps. While it may seem that your baby is perfectly still when she is sleeping, she really isn't. The under-the-mattress Sensor Pad detects your baby's slightest movements. If your baby goes absolutely still for 20 seconds, the Sensor Pad sends a signa... [Read More]

itor) two AC adapters It can also operate with 8 AAA batteries (not included).