It is sure that the Bluetooth mouse are also very interesting (because without adapter) but they are still expensive enough for now.
Note that at this price, Logitech provides even the battery (type LR6). The storage of the wireless adapter in the battery behavior is also well clever to avoid losing it. So what more could you want?
honestly I would have liked a little more precision (the optical sensor is not exceptional), but again, at this rate, how to be choosy?
short, a must-have cheap wireless mouse, you can go there with your eyes closed!