Installed under the mdf table top 25mm. Iphone 8 plus in a leather case charges with normal speed. Position the phone need exactly plus or minus 10mm. Induction sticker was not used. I do not know why it and how it affects. With proper positioning and the beginning of the charge process, the charging induction unit produces a beep (squeak) loud enough-useless, in my opinion, function, but how to disable i do not know. Overall satisfied. Of the minuses-a power supply with a pindock plug and an adapter for the euro, in my opinion flimsy. With delivery everything is fine. The seller replied that you can use wireless charging and without induction sticker, it will only make it difficult to position the phone.