In the past, the only baby monitor system available was the wired variety, which connects the transmitters and receivers together. The benefit of such a system is that you can never stray out of range, you always know where the receivers are and you won’t have any chance of interference from household appliances, cordless phones, microwaves, wireless internet or the neighbors’ baby monitors. However, this unit must be installed by a professional (much like a security system) in one, fixed place and there will be no mobility. On the other …