ATGBICS Amer compatible QP4SPC100 40GBase-CU QSFP+ to 4 SFP+ Passive Direct Attach Cable operates over Passive Copper with a cable length of 1m. This product operates within a commercial temperature range. It is suitable for short reach connection between 40G QSFP+ and 10G SFP+ enabled host adapters, switches, and servers in 40G interconnecting networking applications and provides a cost-efficient way to connect hardware within close proximity racks. This breakout cable connects to 1 x 40G QSFP+ port on one end and to 4 x 10G SFP+ ports on the other end. Our product meets the specification of Amer QP4SPC100 and we proudly offer a compatibility guarantee and limited lifetime warranty. Our rigorously tested products record a unique traceable serial number and are fully compliant with all MSA (Multi-Source Agreement) and IEEE standards & protocols.