This listing is for a LOT OF (3) Cisco QSFP-40G-CSR4 10-2837-0340GBASE-CSR4 QSFP Module.These items have been tested and are ingood working condition. We’ll provide a 60-day warranty. We do not provide any additionalsoftware or any other parts with this item unless expressly stated above. Whenapplicable any configuration, software, password issues as well ascompatibility for particular purposes are Buyer’s responsibility and are notcovered by "NO DOA" warranty.