Adjustable button lets you adjust the DPI instantaneously, up to 5000. With F.L.U.X. desktop software, you can create unlimited profiles for your mouse while storing the top profile on the mouse itself. Built around a super lightweight design, the R.A.T. 2+ only weighs 67g, ideal to take on-the-go. Create the perfect grip with the adjustable palm rest, letting you play in comfort. And with durable, long-lasting switches, the R.A.T. 2+ can keep up with the even most furious clicker, with a five million click lifetime. Connector/Port/Interface: USB 2.0; Left/Right Hand Use: Left/Right; Mouse Technology: Optical; Wired/Wireless: Wired.