1Smart Control: Can control the hearing of 3D printer extruder, hotbed, print head, etc. through 524V digital signal. 2Reliable Work: The MOSFET ensures excellent working performance, meanwhile the firm connection promise stable output. 3Good Matching: Able to proceed control by using the heated bed output signal of Ramp1.4 and series, quick and reliable. 4Better Design: Equipped with large heat sink, the 3D printer heating controller enables a maximum current up to 30A. 5Easy to Install: Comes with a light weight and a compact size as well, the simple installation can be quickly finished. Item Type: 3D Printer Heating Controller Material: PCB, aluminium heat sink. 1 x 3D Printer Heating Controller 1. When connecting the power supply, pay attention to the positive and negative poles. 2. When connecting the heated bed to the heating wire, pay attention to the positive and negative poles.