The Angelcare Digital Video Movement and Sound Monitor AC1100 uses high quality video with infrared light in combination with the Sensor Pad and crystal clear sound transmission to ensure that you can keep your eyes and ears on your little one from anywhere in your home, anytime of the day or night. This 3-in-1 monitor uses a discreet Sensor Pad that slips under your baby?s mattress and monitors their movement as they sleep. With an adjustable sensor that can be changed to suit the habits of your child as they continue to grow, you?ll never feel too far from your little one no matter where you are in the house. Anything from the slightest breathing movement to a mid-slumber wriggle is detected, while the monitor also has an alarm system that will sound if nothing is detected for 20 seconds, giving you ultimate peace of mind. There is even a ?tic? notification system for when your baby is sleeping silently to alert you that the unit is powered on, and a Hold & Mute function so you don?t sound the alarm should you need to feed or change your baby during the night. The ring on the Nursery Unit also doubles as a soothing night light, allowing you to check on your little one without the need to disturb their slumber. Please note; monitoring of premature baby or babies considered to be at risk, should be carried out only under the supervision of a Doctor or Health Professional. This monitor should NOT be used as a medical device, nor as a device to prevent Sudden Infant Death Syndrome (SIDS).