No need to have been the ENA to install it, just insert the small nano-receiver into the USB port of the computer, remove the protection of the supplied battery and here we go !! !
Logitech promises 18 months without changing batteries, here I will test in time (^_^)
I am delighted that mouse, no annoying wire, it stops by itself when you stop the move and it's super accurate. Very good quality / price ratio. What more !!!