Fangrui Product Details the spring cover design: and -up to take out the jumper for use, and then to hide the jumper after using the jumper, avoiding mess! Storage compartment design, convenient for placing small accessories Lanyard hole design, easy to carry Optical fiber test extension cable: waterproof and dustproof, pressure- and drop-, excellent sealing Make up for OTDR test blind spots: no fusion splice in the middle of the fiber Small size, light weight, easy to carry Has excellent sealing performance waterproof, , explosion-proof Model Number:-20 Fiber Type:Single Mode Model Number:SCAPC-SCAPC type:300M Colour:blue Material:plastic Package Contents: 1 x Fiber Tester Only 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.