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 3 m (10 ft) - QSFP+ direct-attach copper cable complies with MSA industry standards - Passive DAC copper cable has low power consumption of less than 1 watt - Hot-swappable with fiber optic QSFP+ breakout cables and other copper DACs - Uses cost-effective copper cabling alternative to fiber optics