The Cell Sensor EMF meter is one that CCPRS uses on every investigation. This unit has a dual purpose. It can measure cell phone radiation when the remote sensor is not plugged into the device and it measures EMF when the sensor is plugged in. The meter has a high and low setting, a light sensor that flashes faster or slower depending on the amount of energy it detects and an audio alert that responds to the amount of energy it detects as well.  It is a favorite meter of a lot of researchers and investigators in the field.  Because of this units popularity in the field of Paranormal Research the makers of this device has since put out another version known as the "ghost meter". It has the EMF sensor built into the device, which makes it easier to use.  The unit is plastic and can be broken easily if dropped and is sensitive to sudden movements. The meter can be found on the web for around $25-40.00 USD.