The AC Variable Frequency Drives e-learning XPRTU, online version, can be accessed via any web browser. Access is for a period of 3 Years. It also entitles you to get Certified for free when you take the Abhisam online Certification test for AC Variable Frequency Drives within the 3 year access period. Access will be granted within one business day after purchase, when you will be sent an email with your Login ID and License Key.