Features: The push-pull lock is fully locked when the connector is inserted, and the spring valve closes automatically when pulled out. The use of high-quality ferrules allows the fiber to be connected through an internal open sleeve and various shapes of performance adapters are used to ensure the connection between fiber patch cords. Unique mechanical structure design of E2000, the adapter has strong interchangeability, excellent repeatability and stable and reliable performance. Plug and Play, Easy to use. Packaging includes: 1x E2000 Fiber Adapter, 2x Screws, 2x Nuts. Specifications: Model Number:E2000 Attenuation value: 2-20dB Attenuation accuracy: 0.5dB Working wavelength: 1310/1550 Return loss: ≥ 65dB Working temperature: -40~+70 ° C Storage temperature: -40~+85 ℃ Color: Green Packaging includes: 1x E2000 Fiber Adapter 2x Screws 2x Nuts