Ultra comfort, outstanding performance and attractive appearance with high elasticity silica gel.Special ultra-Quiet technology can reduce the noise during use prevent spills damageConnectivity : USB 2.0 Special design for space bar and enter key High resilience, enhance the touch feeling and increase of service life Prevent spill design, prevent spill damage Works with Windows 7/8/98/2000/XP/Vista/10 Optical mouse 1200 dpi 3 buttons & scrolling wheel Life time: 3.000.000