Zowaysoon 650nm 30mW Metal Visual Fault Locator Pen Type Fiber Optic Cable Tester for CATV 25-30KM 1. 30mW(25-30KM)visual fault locator is used for the measurement in single-mode or multi-mode fibers 2. 2.5mm Universal Connector for test different ST,SC,FC interfaces 3. Operates in both CW(Continuous wave) and pulse mode ; Dust-proof design keep fiber connectors clean Dynamic Distance : &gt;184.Pen shape design, convenient to carry and use, High effective power circuits allow for stable powerkm--It features a rugged design, a universal connector and an accurate measurement. 5. Wavelength:650+/-10nm, LED indicator for Power, Battery Low and CW/Pulse indicators