Not all baby monitors are at fault for WiFi interference. In the US you can look up the product's FCCID in the FCC database and it will tell you what frequency

Not all baby monitors are at fault for WiFi interference. In the US you can look up the product's FCCID in the FCC database and it will tell you what frequency it uses. http://www.fcc.gov/oet/ea/fccid/ http://www.fcc.gov/oet/ea/fccid/ I'm not sure if the UK has a similar licensing system search or not.