an advertisement . please help improve it by removing promotional content and inappropriate external links and by adding encyclopedic content written from a neutral point of view . march 2013 learn how and when to remove this template message lojack corporation type corporation traded as nasdaq lojn industry vehicle tracking founded massachusetts 1986 headquarters canton ma u.s. area served worldwide key people randy l. ortiz chief executive officer and president ken dumas senior vice president chief financial officer and treasurer hal dewsnap senior vice president and general manager u.s. automotive revenue 133.6 m 2014 1 number of employees 618 website www.lojack.com the lojack stolen vehicle recovery system is an aftermarket vehicle tracking system that allows vehicles to be tracked by police with the aim of recovering them in case of theft . the manufacturer claims a 90 % recovery rate . 2 the name lojack was coined to be the antithesis of hijack wherein hijack refers to the theft of a vehicle through force . 3 lojack s core business comprises the tracking and recovery of cars trucks construction equipment commercial vehicles and motorcycles . however lojack is expanding into new markets through licensing agreements and investments in areas such as cargo security and people at risk of wandering probationers parolees and alzheimer s patients . lojack corporation claims that over 300 000 vehicles have been recovered worldwide since the product was introduced more than two decades ago . 2 contents 1 functionality 2 see also 3 references 4 further reading 5 external links functionality edit the core of the lojack stolen vehicle recovery system is a small silent radio transceiver that is installed in a vehicle . the vehicle is not marked as possessing a lojack transceiver and the location of the transceiver within the vehicle varies from one car to the next . once installed the unit and the vehicle s vin are registered in a database which interfaces with the national crime information center ncic system used by federal state and local law enforcement agencies throughout the u.s. in the event of a theft a customer reports the incident to the police who make a routine entry into the state police crime computer including the stolen vehicle s vin . this theft report is automatically processed by lojack computers triggering a remote command to the specific lojack unit in the stolen vehicle . the command tells the lojack unit to start sending out signals to tracking units on board some police cars . every police car so equipped that is within a 3 5 mile radius of the signal source will be alerted . the tracking units will display an alphanumeric serial number and an indication of the approximate direction and distance to the stolen vehicle . based on the serial number the police can obtain a physical description of the vehicle including make brand model color vin and license plate number . police aircraft can also be equipped with tracking units ; airborne units can receive the line of sight signals from further away than ground based units . the company s systems are operable in 29 u.s. states the district of columbia and in 30 counties . 4 upgraded more expensive systems can alert the owner of a vehicle in the event the car is moved or started . lojack transmits on a radio rf carrier frequency of 173.075 mhz . vehicles with the system installed send a 200 millisecond ms chirp every ten seconds on this frequency . when being tracked after reported stolen the devices send out a 200 ms signal once per second . 5 6 the radio frequency transmitted by lojack is near the vhf spectrum band formerly used in north america by analog television channel 7 7 although there was minimal interference due to the low power of radiation brief chirp duration and long interval between chirps . 8 the lojack signal is received in equipped police vehicles utilizing a phased array antenna system hence the four distinctive antennas on the roof . this provides the direction finding capabilities of the lojack system . see also edit motor vehicle theft carjacking onstar radio direction finder vehicle tracking system comparison of device tracking software lojack for laptops computrace references edit http www.prnewswire.com news releases lojack corporation announces fourth quarter and full year 2014 results 300035160.html a b what is lojack . retrieved 2006 08 23 . hindo brian 2006 01 16 . lojack s stronger signal . businessweek . http www.lojack.com request for waiver of section 90.20 e 6 . fcc usa . 2000 08 31 . retrieved 2008 05 31 . lojack radio frequency how lojack works . freq of nature . retrieved 2008 05 31 . television frequency table . retrieved 2008 05 31 . private land mobile services ; stolen vehicle recovery systems proposed rule . federal register . 71 163 . 2006 08 23 . retrieved 2008 05 31 . further reading edit ian ayres and steven levitt measuring positive externalities from unobservable victim precaution an empirical analysis of lojack . quarterly journal of economics 1998 113 1 pp. 43 77 external links edit lojack corporation lojack stolen vehicle recovery story blog retrieved from https en.wikipedia.org w index.php title lojack & oldid 743834046 categories automotive accessoriescompanies based in massachusettscar theftrootkitssecurity technologywireless locatinggeolocationhidden categories articles with a promotional tone from march 2013all articles with a promotional tone navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages norsk bokm lpolski edit links this page was last modified on 11 october 2016 at 14 46 . text is available under the creative commons attribution sharealike license ; 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