Note: This module should be used with the Lerdge Motherboard, so you need to buy one if you don't have. Product Description: The power monitoring module, used with Lerdge 3D printer motherboard, can achieve power continued to play, automatically turning off after the printing finished, the software control the power off, monitor the power status and other functions. It can help to achieve interactive printing, and to help in the cases like the unexpected power off or you have to leave during the printing, and other similar issues, considered to be one of the most useful features in 3D printers.