HP Wireless Raspberry Dandelion Mouse (LX461AA#ABC) Stay connected with advanced wireless technology HP 2.4GHz Wireless Mobile Mouse,Comfort - Rubber sides and symmetric design provide comfortable and secure grip for left or right hand use Stay Connected - Advanced 2.4GHz wireless technology for less interference and longer range of operation to work further away Travel with confidence - Optical sensor with adjustable sensitivity (1250 CPI default, 1750 CPI max) works on many surfaces No more lost receivers - The micro-receiver is so small you can store it inside the mouse