Dual core, dual boot - why not dual optical sensors? The V400 comes optimized with dual laser technology that allows good tactile feedback on all surfaces except glasses and mirrors.The technology has been around for a while though. So the selling point of the V400 has to do more with its full feature set. You can keep the USB wireless receiver safely inside the mouse, as well as utilize the middle wheel for left and right browsing, patent as Tilt Wheel Plus Zoom.
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