Not sure about the other products but mine was clearly fake. It felt very cheap, almost toy-like, the side buttons didn't even press, they were just there, the mouse legs looked like they had been tampered with, came with the wrong cable, and the dead sign for me was the weight. It claims to weigh 80 grams but appears to be significantly lighter than my O model which weighs 67 grams. I hope other people get the really updated G Pro Wireless and don't get fooled. If you're reading this, make sure you do your research!
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