Probably one of the few wireless gaming mice with normal AA batteries that doesn't need to be charged every two days. According to its characteristics and capabilities, this mouse is almost ideal (see advantages), but the trouble came from where they were not expected (see disadvantages). Got pros: Excellent sensor, accurate and fast positioning. Runs on one or two AA batteries, lasts for weeks in game mode and over a year in low power mode It is possible to work both through the receiver and via Bluetooth. Cons: Scrolling with the mouse wheel does not work very well. When scrolling, for example, a web page, quite often it can go in the wrong direction, or twitch and stand still. Today a new firmware 8.5.26 was released, where it seems to be "Fix intermittent scrolling issues experienced on some G603 LIGHTSPEED Wireless Gaming Mice", but in fact the glitch remains, although it appears a little less often and a little softer. I handed over the mouse back to the store, because I did not wait for a response from Logitech support, and bought the same one in another store. In the new instance, the wheel turns normally, and it is clearly different: when scrolling up, it sometimes "rumbles", and is pressed with a smaller amplitude and more jarringly. PS six months later: After the next firmware ate to 8.6.28, scrolling problems began again, not as serious as in the previous mouse, it is quite possible to work, but after hemorrhoids with the previous mouse, they are very annoying. Once again I am changing my assessment and I do not advise anyone to contact this mouse, nerves are more expensive.