The BC130Pro, also known as Nyx Pro In-ear monitor earphone cable, is made of complex, high-purity silver and monocrystalline copper. The durable 120cm (47.2 inch) long cable comes with interchangeable connector ends. The new Nyx-Pin connector system is the result of Eletech and ddHiFi's collaboration, with their internal connections matching the Versa systems.Included in the packaging are interchangeable earphone connectors: MMCX, 2-Pin 0.78 (3mm long), 2-Pin 0.78mm (3.5mm long)As well as interchangeable source connectors (Mini XLR 4-Pin): 3.5mm SE and 4.4mm Balanced. Additionally, for convenient portability, the ddHiFi C90 case and CZ180 case are also included.