The 10Gtek 40G QSFP+ to 4Xsfp+ Breakout DAC is a high-quality unit specifically designed for Cisco QSFP-4SFP10G-CU1M - 40GBASE-CR compatibility. It features QSFP+ to SFP+ connectors and is branded for reliability and performance. This unit, made in the United States, includes one module and offers four network ports through SFP connections, making it a valuable addition for enterprise networking setups requiring fast and efficient data transfer.