LED\'s Powerful LEDs provide multi-zone backlighting and the Pixart PMW 3330 optical sensor provides trusted performance that gamers can rely on. Customise your R.A.T All gamers are different. The R.A.T. 4+ is precision engineered, making key parts of the product adjustable, to enhance and improve your playing style. The R.A.T. 8+ has an adjustable palm rest, pinkie rest, thumb rest and weight system. R.A.T. 4+ ( DPI optical sensor) Armed with the respected tournament favourite Pixart PMW 3330 optical sensor, the R.A.T. 4+ is capable of withstanding high movement speeds of up to 150 inches per second and 30G of acceleration. This is crucial for ensuring that all snap-shot reflexes and fast-tracking movements are lag-free. Key Features Colour: Black Series: ‎R.A.T. 4+ black Voltage: 1.5 Volts Dimensions: 10.95 x 8.74 x 3.79 cm