1.Heat dissipation hole design prevents overheating,There are heat dissipation holes on both sides to fast heat dissipation for internal parts and longer service life. 2.Industrial-grade high temperature resistance, no fear of harsh environment,All-metal casing, distributed ventilation and convection heat dissipation, cold and heat resistance to stable and long-term operation in harsh environments of -20C-+70C. 3.24-hour security monitoring,Engineering-grade stable performance, long service life, can work continuously for a long time, connected to the recorder and display, guarding your home, factory and store at all times. 4.High-brightness indicator light makes operation clearer,The indicator light is bright but not dazzling, and the operation of the equipment is clear at a glance. Fiber Type:Single Mode (The product printed words depending on the batch, but this does not affect use) Color: As Shown Material: Metal Package Contents: 1Pair x Optical Fiber Media Converter 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.