When using via Bluetooth, I canโt enter the mouse settings and backlight modes, it turned out only after connecting either a wire or via a USB radio transmitter, after turning off the mouse, the settings do not go astray Has pros: Good delivery set, sits well in the hand, light, comfortable for both play and work Cons: I have been using it for a month now, I bought 2 pieces, I began to notice that on one of the mice, the wheel began to whistle when scrolling! Fire for your money!