Genuine Dell M797C C-UAM35 Wireless Black Radio Frequency (RF) USB Receiver Dongle For Use With M787C Dell Optical Mouse, or M756C, Y853M Dell Multimedia Keyboards (Not Included) Requires USB 2.0 Port Compatible With: M787C Optical Mouse, M756C, Y853M Dell Multimedia Keyboards Dell Part Number: M797C Model Number: C-UAM35 Does not include mouse, Receiver only