Fiber Optic Cable Coupler is the simplest and cost-effective way to connect two fiber optic cables together for network connecting at outdoor environment. Just need to join two cables with simple steps, saving money and time. LC to LC Fiber Optic Cable Extension Coupler is special designed for pre-terminated single-mode fiber optic cable connecting to reach long distance Ethernet extension via fiber optic connection with LC to LC duplex connectors easy plug and play design. IP68 rated protection and reliable waterproof design provides guarantee for any application at outdoor or industrial tough environment, such as outdoor LED equipment, grating, CCTV(closed-circuit monitor series), factory automation control, wireless bridge, etc. There's no need for you damage or configure the original cable, saving cost and ensure security on installation. Besides, it features extremely thin head design, so that you can plug the pre-terminated fiber optic connector directly, offering great convenience on connection. Moreover, EMI protection ensures no signal degradation after connection.