PUREX Technology Ergonomic Vertical Wired Mouse Supports 1000/1600/2400 DPI, Backward/Forward Control Thumb Buttons, Removable Palm Rest - Reduces Wrist Forearm Discomfort - PXE-M618LU USB wired mouse supports hardware 1000/1600/2400 DPI switch Detachable non-slip palm rest Backward and Forward side buttons Retail box