This HP C8R25B Compatible MSA 2040 10GB SW iSCSI SFP+ Transceiver is a high-quality unit that is perfect for your networking needs. It is compatible with HP and supports DDM/DOM, making it a reliable choice for your enterprise networking, servers, and computers/tablets & networking needs. Each quantity is for a pack of 4 modules. It has a SFP+ network port and fiber type of MMF, with a wavelength of 850 nm and a maximum data rate of 10 Gbps. In addition, this unit has a manufacturer warranty of one year and is made in the United States. It is suitable for distances of up to 300 m. This switch module is a great addition to your network and is perfect for those who are looking for a reliable and high-performance unit.