This is an Arista Networks® CAB-D-4Q-400G-1M compatible TAA compliant 400GBase-CU QSFP-DD 400G to 4xQSFP56 100G PAM-4 direct attach cable that operates over passive copper with a maximum reach of 1.0m (3.3ft). It has been programmed, uniquely serialized, and data-traffic and application tested to ensure it is 100% compliant and functional. This direct attach cable is TAA (Trade Agreements Act) compliant, and is built to comply with MSA (Multi-Source Agreement) standards. We stand behind the quality of our products and proudly offer a limited lifetime warranty. Compliant with QSFP-DD MSA Specification Rev 3.4 SFF-8679 electrical interface compliant SFF-8636 management interface support Compatible with IEEE 802.3bj, IEEE 802.3by, IEEE 802.3cd Supports aggregate data rates of 100 and 400Gbps I2C for EEPROM communication Pull-to-release slide latch design 28AWG through 32AWG cable Excellent EMI/EMC performance 360-degree cable shield termination Advantage dual side pre-solder automated assembly technologies