SODIAL(TM) 2.4G 800/1600 DPI Wireless USB Optical Mouse w/ Mini Receiver PC *Gray* 2.4G Wireless USB Optical Mouse w/ Mini Receiver Grey Color: Grey Comes with a mini receiver, only the thickness of two coins Optical sensor up to 800/1600 dpi. Switchable dpi among 800/1600. Power: 1* AA Battery (not include)