I am looking for a product that offer the latest technology in bug detection and detect a wide range of surveillance devices including conventional VHF/UHF listening bugs, phone bugs, GSM bugs, 3G wireless devices, spy phones, covert cameras and GPS vehicle trackers. It should have working frequency range 50-2400 MHz and Pulse indicator but do not know which one I should buy. If someone has any idea or know about it please tell me also