The TWR/Hark DM900/DM32, remote monitoring systems were among the first products FCC approved that allow the elimination of quarterly light inspections saving their owners thousands of dollars annually. These systems are designed to interface with all FAA-approved alarmed lighting systems and additional site equipment such as generators or AC units utilizing contact closures or voltage alarms. Remote monitoring options include CDMA/GPRS wireless modems, Ethernet TCP/IP, satellite, POTS line, windows-based software. www.twrlighting.com