[What you Get] 1x 100% tested 1000Base-SX modules, 30-day Money-Back guarantee with 3-Year warranty and lifetime tech support. 10Gtek is a manufacturer of transceiver, customized service is available. [Superior DDM Monitoring] DDM allows you to monitor the critical information concerning the status of the transmitted and received signals of the transceivers in real-time to find out some potential problems. Operating Temperature: 0°C to 70°C. [Easy to Use] Easy installation, plug and play, fully hot-pluggable with ESD protection. Widely used in fiber switches, routers, NIC, server or other fiber optic equipments with 1Gbps SFP ports. SFP MSA Compliant, IEEE 802.3ab Compliant. [Wide Compatibility] Compatible with HP ProCurve J4858C J4858B J4858A HPE Aruba J4858D and Other Open Switches. Widely support Gigabit Ethernet, Fiber Channel, Other Optical Links and other devices. 1000BASE-SX SFP to LC Optical Gigabit Ethernet Fiber transceiver module, 1.25G Multimode SFP(supports OM1/OM2/OM3/OM4 fiber cables), Duplex LC connector, 850nm, DDM, up to 550m.