Hot bed high power module, mini size. The heat dissipation is stronger, and the current load problem is solved. Very powerful MOSFET to withstand higher current than normal RAMPS or other 3D Printer controller can handle Voltage: 12V-24V (12V, can use 360W; 24V can use 720W) This module is based on power MOSFET and will allow PID control of the heated bed (DC-DC Relays usually do not allow this) Under the premise of normal cooling, it work stable under I(Max)=25A, the current must not exceed 25A while the process working. Package Includes: 1 Piece Power Module 1 Piece Signal Control Line 2 Pieces Power Supply Wiring Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !