Radio frequency detection device and system

A system for monitoring unauthorized use of one more devices emitting a radio frequency in a secured area, comprising:

• one or more computers each configured to display a user interface;
• one or more radio frequency detection devices operably coupled to the one or more computers, each of the one or more radio frequency detection devices comprising a power supply, a radio frequency circuit board electrically coupled to the power supply, an antenna, and a microprocessor electrically coupled to the power supply port and the radio frequency circuit board, the microprocessor configured to report a frequency of one or more detected signals to the one or more computers, report a decibel level of the one or more detected signals to the one more computers, and initiate an unauthorized use alert when the frequency of one or more detected signals is within an adjustable alert frequency range, wherein the adjustable alert frequency range is adjustable through the user interface and the user interface is configured to display the frequency and the decibel level of the one or more detected signals reported to the one or more computers.