1000Base-LX/LH SFP: Gigabit Ethernet Single Mode SFP Module, 1.25 Gb/s, 1310nm wavelength, Duplex Dual LC, SMF, operates on Single-mode (OS1/OS2/OS3) LC/UPC fiber cable spans of up to 20km (12.4 mile) in length. 4 Pack. Wide Compatible: For Cisco GLC-LH-SMD, Meraki MA-SFP-1GB-LX10, Ubiquit UniFi UF-SM-1G, Mikrotik, Intel, Netgear AGM732F, D-Link, TP-Link and Other Open Equipments. Hot-swappable: PLUG and PLAY, with Advanced DDM Function to monitor real-time parameter and state on fiber links. SFP MSA Compliant, IEEE 802.3z- compliant. Low Power Consumption: Less than 1.05 watt power consumption, that can save costs wisely. Low EMI and advanced ESD protection. Each sfp module is individually done test before packing.