em system em antenna 1. Detection range: 75cm - 100cm 2. Used to protect library, book store, drug store, em system, library security ... harm to Human, environmental friendly, more than 10years service life * Antenna Dimension: 1480*540*40mm Weight: 23kg/pc* Package: Antennas: ... theft, the protection is also effective to aluminum foil, foil package.This system can be installed in clothing store, with ...