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KJB Security DD3200 Cell Phone GSM, CDMA / WCDMA & GPS DetectorSee on Walmart
Now when someone's keeping an eye on you with this simple-to-operate Cell Phone and GPS Detector. Detect the presence of active cellular devices and GPS transmitters within 30 feet in seconds.It detects GSM, CDMA, and WCDMA transmission sources, keeping all your bases covered. Choose to receive audible alerts using the included earbud or, if you want to be discreet, keep the device in a pocket and get vibration alerts. Once it detects a signal, adjust sensitivity to home in on and identify whatever is transmitting.... read more.