StarTech.com Cisco QSFP-4SFP10G-CU5M Compatible 5m 40G QSFP+ to 4x SFP+ Direct Attach Breakout Cable Twinax - Copper DAC 40 Gbps Low Power Passive Transceiver - Cisco Firepower C9300 (QSFP4SFP10C5)Cisco QSFP-4SFP10G-CU5M Compatible 5m 40G QSFP+ to 4x SFP+ Direct Attach Breakout Cable Twinax - 40GbE QSFP+ Copper DAC - Low Power Passive Transceiver Module DAC - Cisco Firepower, C9300, C3850100% CISCO QSFP-4SFP10G-CU5M COMPATIBLE QSFP+ BREAKOUT DAC: Works with Cisco switches like Firepower, C9300, C3850, C9300, C9500 and othersTECHNICAL SPECS: 5m (16.4ft) | 40Gbps | Passive Twinax (Copper) | 2x QSFP+ Pluggable Connector | 100 Ohm Impedance | 30 AWG Wire Gauge | PVC Cable Jacket | Hot swappable | MSA CompliantDESIGNED FOR SERVER ROOMS: This DAC is a cost-effective copper alternative to fiber cable inside & between racks; factory termination means high performance & reliability with less maintenance.OUTSTANDING SUPPORT: Backed by StarTech.com for the life of the cable itself, not your equipment; our cables won't void your OEM support and with access to our Tech Advisors 5/24WORKS WITH MSA COMPLIANT SWITCHES: Low power 40GbE DAC also works with switch models from Ubiquiti, D-Link, Netgear, Supermicro, TP-Link and more that accept uncoded modules and transceivers