This manageable multiband cellular signal Mobile Phone Detector for 4G, 3G and GSM shouldn’t be missed during any surveillance operation. Signals of mobile phones, smartphones, vehicle trackers, GSM bugs and covert 3G/4G cameras are indicated on the PKI 4125 Mobile Phone Detector display. The distance between the PKI 4125 Mobile Phone Detector and the detectable object can be up to 50m depending on the output power of the suspect object. Operation of the PKI 4125 Mobile Phone Detector is extraordinary versatile and allows detection of prohibited devises in prisons, conference rooms, hospitals etc. The PKI 4125 Mobile Phone Detector provides adjustable detected sensitivity, audio alarm (beeper or earphone), signal strength indicator, sensitivity tunes for each individual frequency band.