This wireless mouse seemed to work very well: trouble free installation, taking quick and pleasant hand ... but it does not always respond and seems to go to sleep, even in use !!! I tried it on two other computers with the same result. I can not blame the seller, of course, but the manufacturer seems to have not done enough to satisfy its customers.
Ultimately, it is a nightmare. Since I bought a Logitech Wireless Mouse M325 Wireless Optical Mouse 2.4 GHz USB wireless receiver without gray that works perfectly ...