About this item One truth about working is that you always need the cable or adapter when you don't have it in your toolbox. That's why we choose these terminal-block audio connectors. No soldering required! Use stranded or solid core wire and a small screwdriver to create custom wiring jigs. Connecting single wires with open cable heads to your 3.5mm mono jack. With this adapter, you can convert 3.5mm audio interface signals into wires that connect audio signals from 3.5mm mono adapters. Corresponding to the channel terminal block, the wires fixed with screws are more useful, convenient, and fast! Reliable connection, good performance with plastic construction and strain relief. It is more convenient to use quickly without welding. Use for earphone plug. Size: 4 x 3 x 1 inches.