Class IIIR laser product, <5mW power output. Feature: It is specially designed for field personnel who need an efficient and economoical tool for tracing,fiber routing andcontinuity checking in an optical netwerk during and after installation. The pocket size tool send s a visible red laser light thouth fiber optic calbes.Breaks or faults in the fiber will refract the light,creating a bright glow around the faulty area.The universal connector can be used for all the most commonly used fiber interfaces. Specfication: *Easy to check fiber faults with visual red laser light *Universally connector for test different ST,SC,FC interfaces *Test for both single-mode and multi-mode cables with optional 2.5mm fiber optic(Standard) connectors to 1.25mm adapter(Optional) *High effective power circuits allow for stable laser power *Operates in both CW(Continuous wave) and pulse mode *Dust-proof design keep fiber connectors clean *(2)AAA-size alkaline batteries provide 15hours of stalbe continuous operation *LED indicator for Power,Battery Low and CW/Pulse indicators *Output power: 5mW *Spectral width: 650+/-10nm *Transmission: continuous or 3Hz pulsed *Range: visibility up to 5km *Operatiing temperature: -10 to +70C *Store temperature: -40 to +85C *Length: 6.3in(160mm) *Diameter: 0.63in(16mm) *Weight: 230g *Connector: universal(2.5mm ferrule)F601B 2.5mm Package included: 1 x Visual Fault Locator Carry leather case Manual Brand new, ships in 1 business day.