... 1550nm ER SM transceiver 10G sfp 40km 2.OEM/ODM 3.1550nm 4.RoHS-6,UKAS,UL,SGS ,CE,FCC 5.L/T:Stocks 10G base 40km 1550nm ... SM transceiver 10G sfp ,10G sfp,40KM SFP,SFP ERPacking & delivery1. ... packing: transparent trays in cartons &customized2.delivery:within 7 days3.port:shenzhenFeatures1.Duplex LC or Single LC Connector ...