It fits under the mattress of the baby and alarms you when the baby stops moving or is absolutely still for 20 seconds. Some models available also come with audio monitors installed. These come with a portable parent s unit that sends you the alarm and allows you to hear your baby s activities. What are the things that you should consider? Wired baby monitors, as its name implies, makes use of wires to be able to connect the transmitting device and the receiving device. This is a very good system when it comes to baby monitors the only setback is that, the length of wires makes mobility quite impossible. The receiver would more or less just stay in one place. Because of these occurrences, a lot of people have made it a point not to mention any private or confidential information while the baby monitor is switched on. Interference with cordless phones and wireless routers is also a common problem. Every now and then, your baby monitor may compete with these wireless devices for better signal reception. And thus, parents who often find themselves caught up in the middle of work, can now simply talk to the child and calm him down without physically being next to him. The talkback feature can also help maintain the bond of the parent and child, despite the parent being at a certain distance. Parents could sing their lullabies or read stories while they do the laundry or while they clean the house. This includes cell phones, cordless phones, and routers. Microwave ovens could also cause interference on your baby monitor. Since it is inevitable that you will be using other wireless devices around your flat, one of the best things you could do to prevent interference is to always prioritize your baby monitor. There are even some devices that will let you send commands to the baby s device to play different music to hush him or her back to sleep. Both types of baby monitors, audio and video, can either be wired or wireless. The wireless devices may, in some cases, be more advantageous than the wired devices since you will be able to go anywhere anytime for as long as both devices are within range.