Dell M787C Wireless Cordless Optical Mouse M-RBV114 and M797C Receiver C-UAM35, Requires Two AA-Batteries (Not Included) Requires Two AA-Batteries (Not Included) Mouse P/N: M787C. M/N: M-RBV114 Receiver P/N: M797C. M/N: C-UAM35 Plug 'n Play (NO SOFTWARE REQUIRED), Works on ALL Computer Systems That Support USB Connectivity Can Be Used On Desktop & Laptop/Notebook Systems That Support USB