Compatible with all Ipads. Securely hold your tablet or eReader at the perfect height and viewing angle. Simply grab the tablet then adjust into view. Four oversized locking wheels will ensure you can roll safely over most surfaces. Weighted base will ensure stand will not easily tip over. Minimum height 28 inches, maximum height 44.5 inches measured from floor to bar. Compatible with all iPads, Galaxy tablets, Surface, Nexus, Nook, Fire, and other tablets and eReaders measuring 7.75 to 9.5 inches. Attach and remove your device in seconds.