The high sensitivity microwave leakage detector clearly alerts the user to spikes in microwave radiation levels. To use, pass the detector over a microwave that's switched on with a cup of water inside. If large amounts of leakage are detected coming from the microwave's door, hinges or other sections, the detector will emit a loud beeping tone and use visual LED warnings to alert the user. In addition to the dual indicators this instrument also has a built-in LCD screen which shows the value of leakage detected. This detector is supplied alongside a soft carrying case for easy transportation and a 9V battery.