NFL Pittsburgh Steelers Wireless Helmet Mouse
The Pro Specialties Group Wireless Optical Helmet Mouse comes fully loaded and ready to play.  Just plug in the USB micro-transmitter into an open USB port on your computer and you are ready to go.  Uses 2 AAA batteries (not included) and works with both Mac and PC computers.  2.4GHz.  3 buttons and a scroll wheel enable you to tackle any task breaking through the line.