The AC027 is the perfect addition for parents who already own an Angelcare Sound and Movement Monitor. The AC027 will compliment the original monitor perfectly by adding movement monitoring on the second mattress to your current setup. It’s particularly useful if you need to monitor twins or two little ones in the same room. It has Angelcare’s new 40% smaller Movement Sensor Pad with SensAsure Technology. Our new compact design offers the same precise movement detection as previous Movement Sensor Pads. It will only alarm if no movement is detected after 20 seconds. Do you already own a different brand of baby monitor but want to add in Movement monitoring for extra peace of mind now baby is here? The AC027 is perfect because it tracks the tiniest of movements and it will work with all other brands of baby monitors.