Obviously this product is needed: it can charge the tablet without having to open the micro-USB port sealing cap. It should be provided as standard. It is expensive for a piece of plastic with a magnet. I wonder if Sony does not do it on purpose to make more money on a tablet which, incidentally, is excellent. The 4/5 instead of 5/5 is for the price. Attention also not to buy mistakenly DK36 as I did that is for the phone Xperia Z2, not for Xperia Tablet Z2. Sony What a curious idea to call in the same way its phones and tablets! Fortunately, for the latter problem, there is the return service Amazon.