This holds true with the devices called baby monitors which are used by parents to watch over their babies. But these devices all have their limitations. In the case of using baby monitors in blocks of flats with a dozen or more tenants, the devices may encounter several problems which include interference. To get the best possible reception and transmission from a 2.4GHz baby monitor with video capability, switch off all 2.4GHz devices in your house. After that, you may turn on the baby monitor followed by your wireless router that is if you have one. Last but not least, you may switch on the base unit of your wireless phone. If it is only possible to watch over him or her day in day out then you would. Unfortunately you are not robots that do need sleep, eat and rest. You are only humans bound by physiologic limitations. So to aid you with your wanting to watch your baby 24 hours a day, 7 days a week, you may want to consider using wireless baby monitors night and day. Phillips is one of these manufacturing companies that claim that the level of electro-smog released by their gadgets are 10,000 times lower from the safety norms that are accepted internationally. The company also adds a recommendation that for parents to have total peace of mind, they can position the monitoring device at least a meter away from the child. It is a radio transmitter that release FM (Frequency Modulated) signal most commonly between the ranges of 48,830 to 48,890 MHz. These devices have two components, the transmitter and the receiver. Transmitters are being placed 8-10 feet within the baby or closer if possible. Sounds coming from the baby are being picked up and a signal is then transmitted to the receiver. What are the disadvantages of Baby Monitors? First and foremost, baby monitors work more efficiently between ground floor and first floor areas. However, if your home is made of thick concrete walls or has aluminum siding, then this can terribly decrease the strength of the transmitted signal. Parents who own baby monitors have also reported instances of interference.