Generally, wireless surveillance cameras are subject to the possibility of interference from many different sources and it is important to know particular examples for each frequency so you don’t end up with a fuzzy surveillance picture.
The most popular frequencies at one time for wireless security cameras are 2.4 GHz and 5.8 GHz frequencies. The biggest downfalls to these frequencies however are their prevalent use in a large array of other devices such as cordless home phones. This makes it very easy for a camera to be interfered with when using this frequency. Moreover the 5.8 GHz frequencies do provide a bit more bandwidth for wireless signals to use allowing for better transmission and reception than the standard 2.4 GHz frequency.
900 MHz frequency was used as an alternative to the 2.4GHz and 5.8 GHz frequencies when it was found that people were having problems keeping their wireless cameras interference free. This frequency however is now having conflicting issues with some cellular towers and service zones in certain areas. This makes it so wireless cameras with this frequency can’t be used or sold in various regions.
Finally is 1.2 GHz frequency. This frequency once was rather popular in the surveillance industry as it offered a longer wave length which enabled it to go around objects better than 2.4 GHz frequencies could. Recently however this frequency has been adopted as a government and law enforcement frequency. Therefore this frequency of wireless cameras is no longer available or allowed to be used by the general public.