Sturdy- Has four points of contact holding on your phone and works with most cases including LifeProof and OtterBox cases. Universal Design - fits all Tablets 7'-10'. (iPad, Nexus, Sony Xperia, Kindle, Samsung Galaxy Tab). Great for business or personal use - Cup holder base expands from 2.5"-3.5" for small to extra large cup holders. Tablet Holder adjusts from 4"-8" to accommodate most tablets. Adjustable - Rotates 360 degrees for optimal viewing positions. Two 25mm rubber-ball joints provide multiple positioning options to get the best viewing positions.