Before you buy, learn about any new technology and equipment. The Internet is an important tool through which you can learn many things. If you don't want to be disturbed by phone noise in a quiet living environment, you need to ensure a signal jammer. If you want to know how those small devices interfere with the signal, then you need to know this. Each phone can be considered a duplex device. This means it will transmit two frequencies. One for conversation and the other for listening. Therefore, you should know if you want to buy a frequency jammer and you should look at its characteristics carefully.
