Whenever unwanted listeners have to be locked out, the PKI 2340 Frequency Hopping Transmitter System is the only solution. The method of frequency hopping transmissions worldwide is known as the most undetectable version of communication and as the one and only procedure to give total security to all kinds of radio communications. This state-of-the-art, digitally encrypted monitoring system is achieved by the use of latest electronic technologies and micro processors with the guarantee of highest reliability. Although the monitoring transmitter is equipped with a large number of electronic components, it still is compact enough to be hidden inside rooms fast and easily.