Features    
5km measurement range with the default 650 red laser source     
CW or 2Hz modulation can be optional at 650nm red laser source    
CW or 270, 1K, 2K Hz modulation can be optional at the other dual wavelenths    
2.5mm universal adaptor(FC,ST,SC) at 650nm, other two wavelengths with FC/PC adaptor    
Portable size, easy operation

Application  
Maintenance Telecom  
Maintenance CATV  
Test Lab of Fiber Optic