Back Rear very mark on this product as on many other Logitech product unfortunately

The mouse works fine functions etc.
However I am almost 10 years since possèseur !!! a MX Revolution ... Who is aptly named the MX Revolution also features an "intelligent" wheel that adapts to the type of document you Follow down simply "threw" the wheel for scrolling mode Quick Inrush automatically while on this new model is downright loses a multimedia button in favor of a big button "push" to switch from one mode to another ... scrollbars back to the stone age so after 10 years ! um 0/10.

Deletion of also side wheel which was very convenient since 3 different functions (eg, increase, decrease, mutated volume) roulette therefore deleted in favor of a zoom button.

Then Deletion of li-ion battery in favor of a single rechargeable battery with USB cable ... 0/10 ... The autonomy of my MX Revolution 10 years more 1week at the rate of 8 hours of daily use .

(Usb receiver reduced because the old one was bigger and it's me coming to the broken)

Finally and this is also embettant, the shape of the sourris no longer right but slightly rounded, she married less the shape of the hand and palm the MX Revolution, I who have more small hands I have no access to all the buttons on the end of doights and I have to move my hands squarely on the mouse ... after using 15min I had cramps ... In short, I am a product of the user ferving Logitech and customers services, but after returning back with the Z906 audio system relative to the Z5500, it is now the towers mice receiving inferior equipment ... Logitech clearly the financial worries too. ..
The mouse 15Min time then back in its packaging for resale ...