The mini otdr fl-h06 Features: 1.Light weight, hand-held, easy-to-use 2.Measure rang up to 30kmíó50kmíó80km 3.Tolerance of measurement is 0.02% 4.Maximum 5 fault events display 5.5 digits of decimal lcd dispaly 6.Red light fault detector is compatible 7.Auto-shut down in 5 minutes 8.Using two aa alkaline batteries, low battery annunciator Application: 1.Fault location of fiber networks; 2.Fiber length measurement; 3.Fiber networks construction and maintenance; 4.Optical communication system; 5.Fiber catv networks; 6.Security and surveilance system; 7.Fiber lan or pigtail jumper project