Sumvision Kata LED USB Wired Programmable Optical Gaming Mouse 3200 DPI – £16.99  Designed with comfort and precision in mind it fits ergonomically into your hand.  As the Sumvision Kata LED USB mouse is built with gaming in mind it is highly accurate so it’s on you and your skills to reach its full potential.  The optical sensor is accurate to 3,200 DPI (dots per inch) so you feel the fluidity of movement as you play.