Obsidia 3200dpi Ergonomic Optical Pc Mouse, Usb, BlackExperience unparalleled comfort with the obsidia ergonomic mouse. Thanks to its superior design and right hand optimised ergonomic shape, its look and feel will blow you away. The large top casing is large enough to support your entire hand, with the thumb recess providing added grip. The result: you can work away for hours on end without your hand feeling strained. With its class leading build quality and feature set with a 3200dpi optical sensor