Press the spring cover design: press and pop-up to take out the jumper for use, and then press to hide the jumper after using the jumper, avoiding mess!Storage compartment design, convenient for placing small accessoriesLanyard hole design, easy to carryOptical fiber test extension cable: waterproof and dustproof, pressure-resistant and drop-resistant, excellent sealingMake up for OTDR test blind spots: no splice in the middle of the fiber Small size, light weight, easy to carry, Has excellent sealing performance waterproof, anti-fouling, explosion-proofModel Number:-20Fiber Type:Single ModeModel Number:SCUPC-SCUPCType:300MColour:GreenMaterial:PlasticPackage Contents:1 * Fiber TesterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.