A) -Description : Fiber Optic Link (Standalone,4ch Video Tx, 4ch bi-dir Data Transceiver, 1310/1550 nm, MM, 1 Fiber, 2 Km, ST Connector) -Model : C404-31WA-C0(N) -QTY :10 Pcs -Manufacturer : Cominet B) -Description : Fiber Optic Link (Standalone,4ch Video Rx, 4ch bi-dir Data Transceiver, 1310/1550 nm, MM, 1 Fiber, 2 Km, ST Connector) -Model : C404-31WB-D0(N) -QTY : 10 Pcs Show More