ETU-LINK 56G QSFP+ DAC is a high-speed data communication copper cable typically used for connecting data centers, computer networks, and communication devices. It features a QSFP+ (Quad Small Form-factor Pluggable Plus) interface and supports a transmission rate of 56Gbps. This copper cable provides high-speed and stable data transmission, making it suitable for applications that require high bandwidth and low latency. It is widely used in data centers and network environments due to its high-speed data transmission capabilities over short distances, as well as its cost-effectiveness and easy installation process.