Crime pays for Napco Security Technologies. If you're trying to prevent it, Napco manufactures a slew of security products used in commercial and residential buildings, as well as government and institutional facilities. Products include burglary and fire alarm systems, exit alarm-locks and digital-access control locks, and emergency communications systems. Napco also buys and resells security devices made by third-party manufacturers. The company sells its products worldwide mainly through independent distributors, dealers, and installers of security equipment. Roughly 10% of sales are made outside the US. Napco operates manufacturing plants in the US and the Dominican Republic, and a sales office in the UK.