Comes with a large battery In general, the mouse is fire, but I put 4 stars, for very loud buttons Has some pros: Mouse fire! Everything works as in the description. All functions work like clockwork The buttons are pressed clearly, tactilely, neither easily nor hard. I connected to the bluetooth with half a pink, as soon as I switched the flag to BT, my laptop immediately saw it and offered to connect. Win 11, BT ver. 5.2 Cons: Oooo noisy. All buttons are very calls, both main and side. With a larger battery, it really outweighs the back of the mouse, not super convenient. Haven't tested with a small battery. razer synaps does not work, the program just does not load, I suspect, because you need vpn and all that