The main function S color LCD display, automatic fault alarm function S digital intelligent automatic control of microcomputer, liquid crystal display, time switch machine S automatic control more than 30% to below 95% humidity S automatic display 30% above to 95% below the current humidity S humidity setting accurate to 1%, and control S low temperature automatic defrosting system, automatic detection fault S external drainage pipe, can be continuous drainage S environment humidity liquid crystal display function S regular shutdown function Containing s caster, mobile freely