EAS frequency detector can detect the frequency of the RF antenna, can be detected from the 1-11MHZ to. Is a very good debugging tools are installed. 
 Portable, easy to carry. 
 Small in size. 
 Energy conservation, environmental treasure type, contact switch, auto power off. On the 5th battery. 
 Nanjing double-North of Electronic Science and Technology Co., Ltd. specializing in the production of passenger counters, digital alarm, supermarket anti-theft devices, apparel anti-theft devices, books, detector and other anti-meteorite system.