This is such a great holder from Hercules. I love the easy swivel fitting to change from landscape to portrait format. It can be used with phones or tablet computers, and, as you would expect from Hercules, it is very robust, and I like the TightVice mechanism which securely holds your tablet or phone. Personally, I think it works better when attaching to a music stand or mic stand, rather than when clipping it to a flat surface, such as a table; it adjusts to 3cm which I think is not quite thick enough to work as well as I would like on some surfaces. It can be used with any phone or tablet from 6.1” – 13”. Weighs in at 570 g, and has a maximum load capacity of 3 kg, which should be more than enough for most tablet devices.