Incredible product, but cheap feeling. Most noticeable was the heal thickness. all i can say is that after learning how to choose a mouse which is not the looks but if it fits your palm then this mouse is literally the best for me feels like it was made specifically for me really comfortable and it looks nice too all thought i didnt like how it was delivered. ok I purchased Two of these at different timesthey just rockuse them everyday past two years and I have had no problems running on batteries for hours daily without charging for days. bad sound quality. super schnelle Lieferung, TOP ! For this reason, the speaker sounds well balanced in an outdoor environment. ??????Other than that, I love it! The only problem is if you think that you can put this together without a rubber mallet, you are in real trouble. These blow those out of the water in terms of battery life - Im getting around 12-15 hours on a single charge.