The white <b>R.A.T. 9 Wireless Gaming Mouse for PC and Mac</b> from <b>Mad Catz</b> is a customizable gaming mouse designed for use with Windows and Mac computers. The mouse features 2.4GHz wireless connectivity for a cord-free gaming experience. The thumb length and width can be adjusted for comfortable mousing for different sized hands and grip styles. The thumb panel can move forwards, backwards and pivot outward for optimal positioning.