Nanjing double north specializing in the production and supply: the newborn babies prevent throw anti-theft alarm system, prison inmates positioning management alarm system, bazaar, supermarket alarms, shoes and hats advanced EAS systems store alarms electronic alarms, Library books prevent stealing detector, bookstore is small adorn article prevent stealing alarm, drugstore prevent stealing detector, cosmetic anti-theft monitors, Supermarket entrances pendulum, three stick sluice gate, wing brake, digital products alarms, notebook alarms. Filling away device, instrument, degaussing re-demagnetization board, take nail implement, electric take nail implement, advanced EAS systems rf devices, DR sound magnetic tags, EM hard label (clothing shoes and hats purse anti-theft buttons), magnetism, (advanced EAS systems rf, DR sound magnetic) soft labels, bottle label (bottle buttons), milk powder label (milk powder buttons), tape box, CD/DVD protective box, etc.