Flush shutter DC module with inverting power polarity is used to control the 12-24VDC motor of blinds, rollers, shades, venetian blinds, windows, etc.This module is used to control the 12-24VDC motor of blinds, rollers, shades, venetian blinds, windows, etc ... It also supports venetian blind slats tilting and it can be controlled either through a Z-Wave network or through the wall switch. Precise positioning is supported for motors equipped with mechanical or electronic end limit switches.