Black Box Multimode Test Set - 850 nmIntroducing the Black Box Multimode Test Set at 850 nm a rugged, reliable tool designed for professionals who install, test, and maintain multimode fiber networks. Built to withstand challenging environments, this compact solution combines optical power loss testing with LAN cable verification, giving you a single, streamlined device for fiber and network diagnostics. With a machined aluminum construction, TAA compliance, and a single 9 volt alkaline