Name: New 30mw 30km Red Light Visual Locator Fiber Optic Cable Tester Metersku536797 model:material: aluminumColor: Black Size: (L) x (W) 17.5x2.6cm / 6.89''x1.02"(L x W).featuredAndnew high brandquality.Aluminum alloy body, strong and durable.Apply CF/ST/SC interface.Fiber Optics is an economical means of tracing, routing and continuity checking in an optical network during and after installation. Find the point of breakage, bad links, fiber optic cables or bending cracks.Slider switch design to control the cable tester. Continuous wave and pulsed mode output power, constant.The light source and penetration are strong and stable performance.The design is clean fiber dust from connectors.Pattern design pen, compact, lightweight, easy to use and carry.Product parameters:30mw type:wavelength: 650nm 10nmdynamic: within 30 km distance output power: more than 30mw2hz oc frequency:laser type: ldFitting connection: universalWorking temperature: 0~60Storage temperature: -20~+70 Power: 2x AA batteries (included)How to change the ceramic: Step 1: Open the cover, unscrew the red metal pen.Step 2: Remove the broken ceramic casings, and clean the debris and dust (be careful not to damage the base surface). Then tighten the metal head. Packageincluded:a visual locator1 ceramic tube1x bag 1x rope2 AAA batteriesNotice:pleaseallow 1-3cmhasby mistakeAndmanual measurementdon't just do youspiritBefore ordering, pleaseto understandthatcolorscanexistchromaticaberrationasthe placement ofdifferent images.