QSFP+ direct-attach Twinax breakout cable adds 40 GbE connections over copper StarTech.com lifetime warranty on all StarTech.com SFP cables QSFP+ Copper DAC length is 2 m (6.6 ft) QSFP+ direct-attach copper cable complies with MSA industry standards Passive DAC copper cable has low power consumption of less than 0.1 W Hot-swappable with fiber optic QSFP+ breakout cables and other copper DACs Uses cost-effective copper cabling alternative to fiber optics