Hewlett-packard Rechargeable Wireless Optical 5-Button Mouse Rechargeable Wireless Optical 5-Button Mouse Elongated arc shape designed for comfort for both left- and right-hand users. RF technology allows use of mouse within a 6-ft. range of your receiver. USB receiver also serves as a charger for mouse. 800 dpi optical sensor provides accurate cursor movement and superior performance. Five programmable buttons allow one-touch functionality. Two AA NiMH rechargeable batteries and AC adapter included. USB connectivity. Compatible with Windows 98SE, Me, 2000 and XP.