This is PLH3D-CNC Hobby Adapter for simple and quick connection between PLH3D-6W Series Laser Heads and most of the CNC and 3D Printers. This adapter is used as a power supply and as signal cable. One of its sides is connected to 5-pin terminal block which must be connected to PLH3D-6W Series Laser Heads. The other side has one DC-DC jack 5.5/2.1mm terminal block and 4 wires. These 4 wires are Modulation Input 1 and Modulation Input 2 of the PLH3D-6W Series Laser Head.