Some of your questions regarding the sexual harassment prevention training course can be answered from the California Employers Association fact sheet below:
Sexual Harassment Prevention Facts from the U.S. Equal Employment Opportunity Commission.
California law requires all employers of 5 or more employees to provide training to its supervisory and nonsupervisory employees on sexual harassment and abusive conduct prevention. Every two years, nonsupervisory employees must receive at least one hour of training and supervisory employees must receive at least two hours of training. The training may be completed all at once or in segments, as long as the applicable hourly total requirement is met.
The Department of Fair Housing and Employment offers the courses at no cost which includes certificates-Sexual Harassment Prevention Training