Digital technology: using computer chips, amplitude frequency automatic double charged；
Good performance, samll blind angle, high alarm rate；
Low cost
Using optical fiber synchronous anti-jamming technology and DNR/SSS technology, low rate of false positives
Excellent concealment
Detecting width：single channel: 0.7m— 0.9m（Associated with the magnetic stripes）
Wide-range in application
Supermarket, library, bookstore, pharmacy, cosmetic shops, open-shelf markets