Visual Fault Locator Tester Features: Laser output is class 3A (around 3~5 milliwatt) Maximum operation distance is 8 km Simple, versatile, and user-friendly design Rugged, compact, and splash proof copper housing Three operation modes available: "CW" (Continuous wave output), "Pulse" and "Off" modes Continuous wave output mode (CW) for steady fault illumination Pulse mode helps to locate faults under high ambient light conditions Support 2.5mm connectors (for PC/FC/SC/ST) The button switch permits easy one handed operation Handy, pocket pen design 2 AAA-size alkaline batteries provide 50 hours of continuous operation