It's 4 programmable heights, and the base is so sturdy the desk feels solid, even at total extension. EducationSarah graduated through the California State College of Fullerton having a degree in Marketing and advertising. She lives in Southern California which is the proud pet parent of two German Shepherds and https://standingdesklegs94714.blogproducer.com/44656573/stand-standing-desk-for-dummies