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Pro Hybrid wireless/wired mouse
The Razer Ouroboros is a dual wired/wireless mouse so that when the device may be running low on battery the user can just plug it in.
Pro Swappable side magnetic panels
There are swappable magnetic side panels comprised of two thumb grip and two finger rest panels. This allows for users to customize the size and shape to their liking.
The Razer Ouroboros is and ambidextrous device so left or right handers can use it equally.
Pro Rechargeable (and removable) AA battery
There is an included rechargeable AA battery that offers 12 hours of gaming time. It can also be swapped with another battery if needed.
At $149.99 this is a pretty expensive device, even if it is wireless.