Feature:1. It has excellent sealing performance, waterproof, anti-fouling and explosion-proof.2. There is no welding joint in the middle of the fiber, so it is small, light and easy to carry.3. Non-metallic structures do not sag, corrode, or conduct electricity.4. The loss is less than 0.5dBm/km, great guarantee work efficiency.5. The blind area of OTDR is mainly caused by the strong light reflection and pulse width, which will generally extend for hundreds of meters from OTDR. While the OTDR test extension cord is generally used between the OTDR and the tested circuit to ensure that the blind area of OTDR will only be reflected on the extension cord and will not cause a great impact on the tested link.Specification:Condition: 100% Brand NewItem Type: OTDR Launch BoxMaterial: PolypropyleneOperating Temperature: -40-+55CTypical Loss: <0.5db (1000m 1310nm)Size (LxWxH): Approx. 23.4 x 13.2 x 6.4cm / 9.2 x 5.2 x 2.5inWeight: Approx. 737g / 26oz.Package List:1 x OTDR Launch Box1 x Dustproof BagNote:Please allow 1-3cm error due to manual measurement. Thanks for your understanding.