THE ADE 651 FROM ATSC UK AND THE GT200 FROM GLOBAL TECHNICAL ARE FRAUDS. THEY CAN NOT DETECT ANYTHING!
PLEASE CHECK OUT THE FOLLOWING SITES FOR MORE INFORMATION:
YOU WILL FIND ALL THE INFORMATION YOU NEED ON THESE SITES TO ASK THE RIGHT QUESTIONS IF YOU ARE APPROACHED TO BUY THIS EQUIPMENT.
YOUR LIFE IS AT SERIOUS RISK IF YOU RELY ON THESE PRODUCTS!!!