Manufactures alarm monitoring & control products proximity switches public address systems battery chargers & power supplies

Manufactures communication & signaling equipment; paging & security control systems

Manufactures car alarms remote starters & keyless entries

Manufactures & designs transportation & communication products signals & systems specializing in railroads & rapid transits

Manufactures biomedical instruments automated test equipment & printed circuit board assembly & repairing services

Manufactures mobile radio antenna equipment

Manufactures communication equipment fiber optics & laser systems

Manufacture piezoelectric alarms & electronic telephone ringers

Manufactures commercial & residential alarm & signal systems; dynamometers recording accessories; chemical detection devices: analyzers monitoring; carbon monoxide gas & chemical leak detection devices

Manufactures metal security detectors & X-ray screening systems

Manufactures augmentative communications devices

Manufactures video data audio & high speed links stock & custom made fiber optics communication systems & field testing equipment

Manufactures military headsets & cable assemblies

Manufactures communications equipment: computer modems & switches

Manufactures fiber optic street name traffic & special message signs fluorescent blank-out signals & incandescent case signs

Manufactures data communications equipment

Manufactures management & security devices for wireless local area networks

Manufactures cell signaling devices

Manufactures bulletproof windows doors & wall armor

Manufactures integration systems security access control time & attendance systems electronic design services