Mimosa Gigabit Network Interface Device (NID) (100-00039) is an elegant and effective lightning surge protector. Designed to be mounted on the external wall of a building. This lightning arrester allows technician access without having to enter the home, while also providing effective surge protection and a grounding point for any installation requiring Ethernet cabling. For better protection against rain and dust, the NID has a foam cable entry and a sealing closure.